No problem, we've got 1389 and 5626 to multiply
1389 × 5626 = 5626 × (1389)
+ 5626 × 9 yielding 50634
+ 5626 × 80 that results in 450080
+ 5626 × 300 giving us 1687800
+ 5626 × 1000 what gives us 5626000

= 7814514
