No problem, we've got 81781042 and 78918862 to multiply
81781042 × 78918862 = 78918862 × (81781042)
+ 78918862 × 2 that equals 157837724
+ 78918862 × 40 what gives us 3156754480
+ 78918862 × 000 which equals 0
+ 78918862 × 1000 what gives us 78918862000
+ 78918862 × 80000 what gives us 6313508960000
+ 78918862 × 700000 which equals 55243203400000
+ 78918862 × 1000000 resulting in 78918862000000
+ 78918862 × 80000000 that results in 6313508960000000

= 6454066767814204
