No problem, we've got 6340 and 2720 to multiply
6340 × 2720 = 2720 × (6340)
+ 2720 × 0 what gives us 0
+ 2720 × 40 what gives us 108800
+ 2720 × 300 resulting in 816000
+ 2720 × 6000 what gives us 16320000

= 17244800
