Alright, let's work through 81974197 times 79269248 step by step
81974197 × 79269248 = 79269248 × (81974197)
+ 79269248 × 7 producing 554884736
+ 79269248 × 90 that is equal 7134232320
+ 79269248 × 100 that is equal 7926924800
+ 79269248 × 4000 that results in 317076992000
+ 79269248 × 70000 resulting in 5548847360000
+ 79269248 × 900000 yielding 71342323200000
+ 79269248 × 1000000 giving us 79269248000000
+ 79269248 × 80000000 what gives us 6341539840000000

= 6498032951593856
