No problem, we've got 4120 and 6340 to multiply
4120 × 6340 = 6340 × (4120)
+ 6340 × 0 that equals 0
+ 6340 × 20 that equals 126800
+ 6340 × 100 which equals 634000
+ 6340 × 4000 giving us 25360000

= 26120800
