No problem, we've got 6642431 and 11815688 to multiply
6642431 × 11815688 = 11815688 × (6642431)
+ 11815688 × 1 producing 11815688
+ 11815688 × 30 resulting in 354470640
+ 11815688 × 400 which equals 4726275200
+ 11815688 × 2000 producing 23631376000
+ 11815688 × 40000 which equals 472627520000
+ 11815688 × 600000 what gives us 7089412800000
+ 11815688 × 6000000 yielding 70894128000000

= 78484892257528
