We're going to solve 3150 multiplied by 6860
3150 × 6860 = 6860 × (3150)
+ 6860 × 0 giving us 0
+ 6860 × 50 resulting in 343000
+ 6860 × 100 yielding 686000
+ 6860 × 3000 giving us 20580000

= 21609000
