Alright, let's work through 9901 times 7759 step by step
9901 × 7759 = 7759 × (9901)
+ 7759 × 1 that equals 7759
+ 7759 × 00 yielding 0
+ 7759 × 900 producing 6983100
+ 7759 × 9000 giving us 69831000

= 76821859
