Alright, let's work through 98711798 times 78080279 step by step
98711798 × 78080279 = 78080279 × (98711798)
+ 78080279 × 8 giving us 624642232
+ 78080279 × 90 that is equal 7027225110
+ 78080279 × 700 yielding 54656195300
+ 78080279 × 1000 that results in 78080279000
+ 78080279 × 10000 resulting in 780802790000
+ 78080279 × 700000 producing 54656195300000
+ 78080279 × 8000000 which equals 624642232000000
+ 78080279 × 90000000 producing 7027225110000000

= 7707444728431642
