No problem, we've got 3647 and 7440 to multiply
3647 × 7440 = 7440 × (3647)
+ 7440 × 7 what gives us 52080
+ 7440 × 40 that equals 297600
+ 7440 × 600 yielding 4464000
+ 7440 × 3000 resulting in 22320000

= 27133680
