Alright, let's work through 91134745 times 80990992 step by step
91134745 × 80990992 = 80990992 × (91134745)
+ 80990992 × 5 which equals 404954960
+ 80990992 × 40 that results in 3239639680
+ 80990992 × 700 producing 56693694400
+ 80990992 × 4000 producing 323963968000
+ 80990992 × 30000 that is equal 2429729760000
+ 80990992 × 100000 resulting in 8099099200000
+ 80990992 × 1000000 giving us 80990992000000
+ 80990992 × 90000000 producing 7289189280000000

= 7381093403217040
