We're going to solve 5420 multiplied by 3972
5420 × 3972 = 3972 × (5420)
+ 3972 × 0 resulting in 0
+ 3972 × 20 what gives us 79440
+ 3972 × 400 yielding 1588800
+ 3972 × 5000 yielding 19860000

= 21528240
