Alright, let's work through 80843730 times 6721098 step by step
80843730 × 6721098 = 6721098 × (80843730)
+ 6721098 × 0 yielding 0
+ 6721098 × 30 which equals 201632940
+ 6721098 × 700 giving us 4704768600
+ 6721098 × 3000 yielding 20163294000
+ 6721098 × 40000 that results in 268843920000
+ 6721098 × 800000 yielding 5376878400000
+ 6721098 × 0000000 that results in 0
+ 6721098 × 80000000 that is equal 537687840000000

= 543358632015540
