No problem, we've got 1228 and 6389 to multiply
1228 × 6389 = 6389 × (1228)
+ 6389 × 8 producing 51112
+ 6389 × 20 producing 127780
+ 6389 × 200 that results in 1277800
+ 6389 × 1000 yielding 6389000

= 7845692
