Alright, let's work through 80816633 times 39233397 step by step
80816633 × 39233397 = 39233397 × (80816633)
+ 39233397 × 3 that results in 117700191
+ 39233397 × 30 producing 1177001910
+ 39233397 × 600 that equals 23540038200
+ 39233397 × 6000 resulting in 235400382000
+ 39233397 × 10000 yielding 392333970000
+ 39233397 × 800000 that is equal 31386717600000
+ 39233397 × 0000000 that results in 0
+ 39233397 × 80000000 what gives us 3138671760000000

= 3170711046692301
