No problem, we've got 78460989 and 51420786 to multiply
78460989 × 51420786 = 51420786 × (78460989)
+ 51420786 × 9 that equals 462787074
+ 51420786 × 80 which equals 4113662880
+ 51420786 × 900 which equals 46278707400
+ 51420786 × 0000 resulting in 0
+ 51420786 × 60000 which equals 3085247160000
+ 51420786 × 400000 what gives us 20568314400000
+ 51420786 × 8000000 yielding 411366288000000
+ 51420786 × 70000000 that results in 3599455020000000

= 4034525724717354
