No problem, we've got 6392 and 1122 to multiply
6392 × 1122 = 1122 × (6392)
+ 1122 × 2 what gives us 2244
+ 1122 × 90 resulting in 100980
+ 1122 × 300 yielding 336600
+ 1122 × 6000 producing 6732000

= 7171824
