No problem, we've got 3581 and 3680 to multiply
3581 × 3680 = 3680 × (3581)
+ 3680 × 1 that results in 3680
+ 3680 × 80 yielding 294400
+ 3680 × 500 what gives us 1840000
+ 3680 × 3000 that results in 11040000

= 13178080
