No problem, we've got 3644 and 4190 to multiply
3644 × 4190 = 4190 × (3644)
+ 4190 × 4 what gives us 16760
+ 4190 × 40 producing 167600
+ 4190 × 600 that is equal 2514000
+ 4190 × 3000 yielding 12570000

= 15268360
