Alright, let's work through 61709779 times 86897790 step by step
61709779 × 86897790 = 86897790 × (61709779)
+ 86897790 × 9 that is equal 782080110
+ 86897790 × 70 giving us 6082845300
+ 86897790 × 700 that equals 60828453000
+ 86897790 × 9000 that is equal 782080110000
+ 86897790 × 00000 that equals 0
+ 86897790 × 700000 that is equal 60828453000000
+ 86897790 × 1000000 producing 86897790000000
+ 86897790 × 60000000 producing 5213867400000000

= 5362443416488410
