No problem, we've got 8320 and 7720 to multiply
8320 × 7720 = 7720 × (8320)
+ 7720 × 0 that results in 0
+ 7720 × 20 yielding 154400
+ 7720 × 300 producing 2316000
+ 7720 × 8000 which equals 61760000

= 64230400
