diff --git a/cases/float.py b/cases/float.py
new file mode 100644
index 00000000..a7fc8021
--- /dev/null
+++ b/cases/float.py
@@ -0,0 +1,3 @@
+price_val = 6.12658
+world = "swoole"
+print(f'{price_val:.2f}, hello={world}')  # 6.13
diff --git a/conv.php b/conv.php
index 5cc303c9..f730d7bb 100644
--- a/conv.php
+++ b/conv.php
@@ -263,7 +263,7 @@ class Translator
             case 'Subscript':
                 return $this->parseSubscript($value);
             case 'FormattedValue':
-                return $this->parseValue($value->value);
+                return $this->parseFormattedValue($value);
             case 'UnaryOp':
                 return $this->parseTarget($value);
             case 'BoolOp':
@@ -921,6 +921,22 @@ class Translator
         $code = 'return ' . $lines[0] . PHP_EOL;
         return $code . PHP_EOL . $this->getIndent() . '}';
     }
+
+    private function parseFormattedValue($value)
+    {
+        $expr = $this->parseValue($value->value);
+        if ($value->format_spec and $value->format_spec->_type == 'JoinedStr') {
+            if (count($value->format_spec->values) != 1) {
+                debug($value);
+            }
+            $format = $value->format_spec->values[0]->value;
+            if ($format[0] == '.' and $format[-1] == 'f') {
+                return 'round(' . $expr . ', ' . substr($format, 1, strlen($format) - 2) . ')';
+            }
+        } else {
+            return $expr;
+        }
+    }
 }
 
 error_reporting(E_ERROR);
diff --git a/web/public/index.php b/web/public/index.php
index 82063abc..a9247cc3 100644
--- a/web/public/index.php
+++ b/web/public/index.php
@@ -20,11 +20,12 @@
 <iframe src="./input.php" id="iframe-input" class="code-iframe"></iframe>
 <iframe src="./output.php" width="50%" id="iframe-output"></iframe>
 <script>
-    document.getElementById('iframe-input').height = window.screen.height
-    document.getElementById('iframe-output').height = window.screen.height
-    const sub = 60
-    document.getElementById('iframe-input').width = window.screen.width / 2 - sub
-    document.getElementById('iframe-output').width = window.screen.width / 2 - sub
+    const wsub = 60
+    const hsub = 100
+    document.getElementById('iframe-input').height = window.screen.height - hsub
+    document.getElementById('iframe-output').height = window.screen.height - hsub
+    document.getElementById('iframe-input').width = window.screen.width / 2 - wsub
+    document.getElementById('iframe-output').width = window.screen.width / 2 - wsub
 </script>
 </body>
 </html>
diff --git a/web/public/input.php b/web/public/input.php
index b4486f81..86802ccb 100644
--- a/web/public/input.php
+++ b/web/public/input.php
@@ -83,6 +83,8 @@ define('ROOT_PATH', dirname(__DIR__));
         window.parent.frames[1].updateCode()
     }
 
+    $('#divCodeWrapper').css('height', (window.screen.height - 30) + 'px')
+
     $('#btn-convert').click(function () {
 
         const code = textarea1.value
diff --git a/web/public/output.php b/web/public/output.php
index 6ad1a9ec..3aca59b0 100644
--- a/web/public/output.php
+++ b/web/public/output.php
@@ -65,6 +65,8 @@ define('ROOT_PATH', dirname(__DIR__));
         $('#btn-copy').attr('disabled', 'disabled').text('已复制代码')
     })
 
+    $('#divCodeWrapper').css('height', (window.screen.height - 30) + 'px')
+
     function updateLineNumbers() {
         let lineCount = textarea1.value.split('\n').length;
         let lines = '';
diff --git a/web/public/static/css/style.css b/web/public/static/css/style.css
index c01c0a7a..9c1129a6 100644
--- a/web/public/static/css/style.css
+++ b/web/public/static/css/style.css
@@ -3,7 +3,6 @@ select {
 }
 
 #divCodeWrapper {
-    height: calc(100vh - 200px);
     max-height: 800px;
     width: 1200px;
     overflow: hidden;
@@ -41,7 +40,7 @@ textarea {
     padding: 15px;
     z-index: 2;
     overflow-x: auto;
-    overflow-y: scroll;
+    overflow-y: auto;
     white-space: nowrap;
     background-color: rgba(0, 0, 0, 0);
     color: rgba(0, 0, 0, 0);