No problem, we've got 6640 and 3624 to multiply
6640 × 3624 = 3624 × (6640)
+ 3624 × 0 which equals 0
+ 3624 × 40 that is equal 144960
+ 3624 × 600 what gives us 2174400
+ 3624 × 6000 yielding 21744000

= 24063360
