Verified answer

Not sure what you mean but I think it is....

731 x 10 = 7310

731 x 20 = 14620

731 x 5 = 3655

731 x 25 = 14620 + 3655 = 18275

731 x 25 = 18275 + 18275 = 36550

Now.....

731 x 2 = 1462

731 x 4 = 2924

So, 731 x 54 = 36550 + 2924 = 39474

:-)