Post it and have a look; Supplement: No problem, just need an answer, right? Follow-up: Can you send the process? Answer: No problem; I will send you the detailed process, just adopt my answer; You can add Q: 13 19272884. Q? Answer: you can add my QQ to facilitate contact; Supplement: 4×24×25: Methods: First use 4 * 25 = 100, then use 100*24, which is equal to 2400; 8×72× 125: Methods: First use 8 * 125 = 1000, then use 1000*72 to get 72000; 38×5×20: Methods: First use 5 * 20 = 100, then use 100*38 to equal 3800; 5×49×40: Methods: First use 5 * 40 = 200, then use 200*49 to equal 9800; (50× 125)×(4×8): Methods: (50*4)*( 125*8) is equal to 200,000; 24×4×250×5: Methods: 250 * 4 = 1000, 24 * 5 = 120. If you don't understand, ask me.