No problem, we've got 6400 and 8919 to multiply
6400 × 8919 = 8919 × (6400)
+ 8919 × 0 what gives us 0
+ 8919 × 00 that equals 0
+ 8919 × 400 giving us 3567600
+ 8919 × 6000 that equals 53514000

= 57081600
