56*4/7*3/6*5/10*8*1000

6400056 × 4 / 7 × 3 / 6 × 5 / 10 × 8 × 1000 = 32 × 3 / 6 × 5 / 10 × 8 × 1000 = 8 × 8 × 1000 = 64000

8*4*1/2*5*8*100=64*10*100=64000