.

app.py

@@ -57,8 +57,8 @@ def predict_product(num1, num2):
         ground_truth_results = []
         for i in range(step+1):
             ground_truth_digit = ground_truth_digits_reversed[i]
-            ground_truth_digits.append((ground_truth_digit, None))
-            ground_truth_digits = ground_truth_digits[::-1]
+            ground_truth_results.append((ground_truth_digit, None))
+        ground_truth_results = ground_truth_results[::-1]
         # Predicted
         for model_name in models:
             model = models[model_name]