We're going to solve 2131 multiplied by 7690
2131 × 7690 = 7690 × (2131)
+ 7690 × 1 what gives us 7690
+ 7690 × 30 that equals 230700
+ 7690 × 100 yielding 769000
+ 7690 × 2000 producing 15380000

= 16387390
