No problem, we've got 9631 and 840 to multiply
9631 × 840 = 840 × (9631)
+ 840 × 1 giving us 840
+ 840 × 30 which equals 25200
+ 840 × 600 that results in 504000
+ 840 × 9000 what gives us 7560000

= 8090040
