Alright, let's work through 80112279 times 12977802 step by step
80112279 × 12977802 = 12977802 × (80112279)
+ 12977802 × 9 giving us 116800218
+ 12977802 × 70 what gives us 908446140
+ 12977802 × 200 giving us 2595560400
+ 12977802 × 2000 giving us 25955604000
+ 12977802 × 10000 producing 129778020000
+ 12977802 × 100000 what gives us 1297780200000
+ 12977802 × 0000000 which equals 0
+ 12977802 × 80000000 that equals 1038224160000000

= 1039681294630758
