Alright, let's work through 3947 times 7431 step by step
3947 × 7431 = 7431 × (3947)
+ 7431 × 7 giving us 52017
+ 7431 × 40 that is equal 297240
+ 7431 × 900 what gives us 6687900
+ 7431 × 3000 producing 22293000

= 29330157
