(67*28*2)+(64*28)=28*(67*2+64)
67*56+64*28=67*2*28+64*28=(67*2+64)*28=(134+64)*28=198*28=5544
67×56+64×28=67×56+(32×2)×28=67×56+32×(2×28)=67×56+32×56=(67+32)×56=99×56=(100-1)×56=100×56-1×56=5600-56=5544