No problem, we've got 1996 and 8639 to multiply
1996 × 8639 = 8639 × (1996)
+ 8639 × 6 that is equal 51834
+ 8639 × 90 what gives us 777510
+ 8639 × 900 that is equal 7775100
+ 8639 × 1000 giving us 8639000

= 17243444
