No problem, we've got 3660 and 4123 to multiply
3660 × 4123 = 4123 × (3660)
+ 4123 × 0 which equals 0
+ 4123 × 60 what gives us 247380
+ 4123 × 600 that is equal 2473800
+ 4123 × 3000 what gives us 12369000

= 15090180
