We're going to solve 8413 multiplied by 2537
8413 × 2537 = 2537 × (8413)
+ 2537 × 3 yielding 7611
+ 2537 × 10 resulting in 25370
+ 2537 × 400 giving us 1014800
+ 2537 × 8000 what gives us 20296000

= 21343781
