We're going to solve 78705520 multiplied by 77780010
78705520 × 77780010 = 77780010 × (78705520)
+ 77780010 × 0 giving us 0
+ 77780010 × 20 producing 1555600200
+ 77780010 × 500 producing 38890005000
+ 77780010 × 5000 what gives us 388900050000
+ 77780010 × 00000 what gives us 0
+ 77780010 × 700000 resulting in 54446007000000
+ 77780010 × 8000000 which equals 622240080000000
+ 77780010 × 70000000 giving us 5444600700000000

= 6121716132655200
