No problem, we've got 7888634 and 6915997 to multiply
7888634 × 6915997 = 6915997 × (7888634)
+ 6915997 × 4 giving us 27663988
+ 6915997 × 30 yielding 207479910
+ 6915997 × 600 what gives us 4149598200
+ 6915997 × 8000 giving us 55327976000
+ 6915997 × 80000 what gives us 553279760000
+ 6915997 × 800000 what gives us 5532797600000
+ 6915997 × 7000000 yielding 48411979000000

= 54557769078098
