We're going to solve 1991 multiplied by 2315
1991 × 2315 = 2315 × (1991)
+ 2315 × 1 giving us 2315
+ 2315 × 90 yielding 208350
+ 2315 × 900 that results in 2083500
+ 2315 × 1000 resulting in 2315000

= 4609165
