We're going to solve 8602 multiplied by 1644
8602 × 1644 = 1644 × (8602)
+ 1644 × 2 resulting in 3288
+ 1644 × 00 that results in 0
+ 1644 × 600 resulting in 986400
+ 1644 × 8000 yielding 13152000

= 14141688
