如何在Keras/Tf中实现两层张量积

import tensorflow as tf
from tensorflow import keras

input1 = keras.Input(shape=(n,))
input2 = keras.Input(shape=(m,))

dot_product = tf.keras.layers.Dot(axes=1)([input1, input2])

model = keras.Model(inputs=[input1, input2], outputs=dot_product)
model.compile(optimizer='adam', loss='mse')