No problem, we've got 87477760 and 78636607 to multiply
87477760 × 78636607 = 78636607 × (87477760)
+ 78636607 × 0 giving us 0
+ 78636607 × 60 giving us 4718196420
+ 78636607 × 700 giving us 55045624900
+ 78636607 × 7000 yielding 550456249000
+ 78636607 × 70000 producing 5504562490000
+ 78636607 × 400000 resulting in 31454642800000
+ 78636607 × 7000000 that is equal 550456249000000
+ 78636607 × 80000000 giving us 6290928560000000

= 6878954234360320
