No problem, we've got 3720 and 5800 to multiply
3720 × 5800 = 5800 × (3720)
+ 5800 × 0 that equals 0
+ 5800 × 20 yielding 116000
+ 5800 × 700 that equals 4060000
+ 5800 × 3000 that equals 17400000

= 21576000
