No problem, we've got 2172 and 8543 to multiply
2172 × 8543 = 8543 × (2172)
+ 8543 × 2 what gives us 17086
+ 8543 × 70 producing 598010
+ 8543 × 100 yielding 854300
+ 8543 × 2000 that is equal 17086000

= 18555396
