CNN ISSUE

[anandsharma18]

"C:\Users\Acer\Desktop\python project\Simple-OpenCV-Calculator-master\venv\Scripts\python.exe" "C:/Users/Acer/Desktop/python project/Simple-OpenCV-Calculator-master/cnn_keras.py"
Using TensorFlow backend.
WARNING:tensorflow:From C:\Users\Acer\Desktop\python project\Simple-OpenCV-Calculator-master\venv\lib\site-packages\tensorflow\python\framework\op_def_library.py:263: colocate_with (from tensorflow.python.framework.ops) is deprecated and will be removed in a future version.
Instructions for updating:
Colocations handled automatically by placer.
WARNING:tensorflow:From C:\Users\Acer\Desktop\python project\Simple-OpenCV-Calculator-master\venv\lib\site-packages\keras\backend\tensorflow_backend.py:3445: calling dropout (from tensorflow.python.ops.nn_ops) with keep_prob is deprecated and will be removed in a future version.
Instructions for updating:
Please use rate instead of keep_prob. Rate should be set to rate = 1 - keep_prob.
Traceback (most recent call last):
File "C:/Users/Acer/Desktop/python project/Simple-OpenCV-Calculator-master/cnn_keras.py", line 67, in
train()
File "C:/Users/Acer/Desktop/python project/Simple-OpenCV-Calculator-master/cnn_keras.py", line 62, in train
model.fit(train_images, train_labels, validation_data=(test_images, test_labels), epochs=50, batch_size=100, callbacks=callbacks_list)
File "C:\Users\Acer\Desktop\python project\Simple-OpenCV-Calculator-master\venv\lib\site-packages\keras\engine\training.py", line 952, in fit
batch_size=batch_size)
File "C:\Users\Acer\Desktop\python project\Simple-OpenCV-Calculator-master\venv\lib\site-packages\keras\engine\training.py", line 789, in _standardize_user_data
exception_prefix='target')
File "C:\Users\Acer\Desktop\python project\Simple-OpenCV-Calculator-master\venv\lib\site-packages\keras\engine\training_utils.py", line 138, in standardize_input_data
str(data_shape))
ValueError: Error when checking target: expected dense_2 to have shape (13,) but got array with shape (40,)

please help what can i do