We're going to solve 3455 multiplied by 7811
3455 × 7811 = 7811 × (3455)
+ 7811 × 5 producing 39055
+ 7811 × 50 which equals 390550
+ 7811 × 400 giving us 3124400
+ 7811 × 3000 yielding 23433000

= 26987005
