No problem, we've got 3645 and 2436 to multiply
3645 × 2436 = 2436 × (3645)
+ 2436 × 5 what gives us 12180
+ 2436 × 40 yielding 97440
+ 2436 × 600 that equals 1461600
+ 2436 × 3000 that equals 7308000

= 8879220
