No problem, we've got 6340 and 1881 to multiply
6340 × 1881 = 1881 × (6340)
+ 1881 × 0 which equals 0
+ 1881 × 40 what gives us 75240
+ 1881 × 300 that results in 564300
+ 1881 × 6000 what gives us 11286000

= 11925540
