title: keras divide inputs by a constant without using ImageDataGenerator
body: <p>Hi I was wondering if there is a way in which I can use a layer to divide a tensor by a constant in keras within the model instead of using ImageDataGenerator e.g.</p>
  
  <pre><code>sequence = [
      keras.Input(shape=(224,224,3)),
      &lt;------ DIVIDES ALL THE INPUTS BY 255
      keras.layers.Dense(32, activation="softmax"),
  ]
  model = keras.Sequential(sequence)
  </code></pre>