We're going to solve 1639 multiplied by 3615
1639 × 3615 = 3615 × (1639)
+ 3615 × 9 yielding 32535
+ 3615 × 30 which equals 108450
+ 3615 × 600 that results in 2169000
+ 3615 × 1000 what gives us 3615000

= 5924985
