Alright, let's work through 99679641 times 77827658 step by step
99679641 × 77827658 = 77827658 × (99679641)
+ 77827658 × 1 that is equal 77827658
+ 77827658 × 40 what gives us 3113106320
+ 77827658 × 600 that results in 46696594800
+ 77827658 × 9000 what gives us 700448922000
+ 77827658 × 70000 what gives us 5447936060000
+ 77827658 × 600000 what gives us 46696594800000
+ 77827658 × 9000000 that equals 700448922000000
+ 77827658 × 90000000 resulting in 7004489220000000

= 7757833009310778
