No problem, we've got 8421 and 1172 to multiply
8421 × 1172 = 1172 × (8421)
+ 1172 × 1 which equals 1172
+ 1172 × 20 producing 23440
+ 1172 × 400 what gives us 468800
+ 1172 × 8000 that results in 9376000

= 9869412
