No problem, we've got 6390 and 8071 to multiply
6390 × 8071 = 8071 × (6390)
+ 8071 × 0 giving us 0
+ 8071 × 90 which equals 726390
+ 8071 × 300 producing 2421300
+ 8071 × 6000 giving us 48426000

= 51573690
