Alright, let's work through 91290178 times 80342441 step by step
91290178 × 80342441 = 80342441 × (91290178)
+ 80342441 × 8 yielding 642739528
+ 80342441 × 70 what gives us 5623970870
+ 80342441 × 100 giving us 8034244100
+ 80342441 × 0000 that results in 0
+ 80342441 × 90000 producing 7230819690000
+ 80342441 × 200000 what gives us 16068488200000
+ 80342441 × 1000000 producing 80342441000000
+ 80342441 × 90000000 giving us 7230819690000000

= 7334475739844498
