=(2*50)*73596=100*73596=7359600

=(25*4)*37896=100*37896=3789600

=4873*(125*8)=4873*1000=4873000

=200*4-25*4=800-100=700

=100*8+125*8=800+1000=1800

=(638+362)*87=1000*87=87000