We're going to solve 1639 multiplied by 2480
1639 × 2480 = 2480 × (1639)
+ 2480 × 9 resulting in 22320
+ 2480 × 30 what gives us 74400
+ 2480 × 600 that is equal 1488000
+ 2480 × 1000 giving us 2480000

= 4064720
