No problem, we've got 8243 and 2159 to multiply
8243 × 2159 = 2159 × (8243)
+ 2159 × 3 what gives us 6477
+ 2159 × 40 which equals 86360
+ 2159 × 200 that is equal 431800
+ 2159 × 8000 that is equal 17272000

= 17796637
