bug fix

app.py

@@ -17,7 +17,7 @@ def resize_with_fixed_aspect_ratio(image, new_metrics, size_metrics="height"):
     elif size_metrics=="width":
         aspect_ratio = height / width
         new_width = new_metrics
-        new_height = int(new_width / aspect_ratio)
+        new_height = int(new_width * aspect_ratio)
 
     new_size = (new_height, new_width)
     new_size = (new_width, new_height)