Alright, let's work through 84175667 times 79979728 step by step
84175667 × 79979728 = 79979728 × (84175667)
+ 79979728 × 7 resulting in 559858096
+ 79979728 × 60 resulting in 4798783680
+ 79979728 × 600 giving us 47987836800
+ 79979728 × 5000 that results in 399898640000
+ 79979728 × 70000 that results in 5598580960000
+ 79979728 × 100000 that results in 7997972800000
+ 79979728 × 4000000 that results in 319918912000000
+ 79979728 × 80000000 giving us 6398378240000000

= 6732346950878576
