No problem, we've got 78609989 and 66489382 to multiply
78609989 × 66489382 = 66489382 × (78609989)
+ 66489382 × 9 that is equal 598404438
+ 66489382 × 80 what gives us 5319150560
+ 66489382 × 900 producing 59840443800
+ 66489382 × 9000 that equals 598404438000
+ 66489382 × 00000 that equals 0
+ 66489382 × 600000 that equals 39893629200000
+ 66489382 × 8000000 that equals 531915056000000
+ 66489382 × 70000000 which equals 4654256740000000

= 5226729587636798
