No problem, we've got 8181 and 2544 to multiply
8181 × 2544 = 2544 × (8181)
+ 2544 × 1 that results in 2544
+ 2544 × 80 resulting in 203520
+ 2544 × 100 resulting in 254400
+ 2544 × 8000 what gives us 20352000

= 20812464
