parts as we have two phases first we compute the number of multiplications in depth wise convolution so here the kernels have a shape DK cross D K cross 1 so the number of multiplications on one convolution operation is all DK times DK DK square when applied over the entire input channel this convolution is performed DG x DG number of times so the number of multiplications for the kernel over the input channel becomes DG square times DK square now such multiplications are applied over all em input channels for each