Alright, let's work through 89153355 times 80041612 step by step
89153355 × 80041612 = 80041612 × (89153355)
+ 80041612 × 5 yielding 400208060
+ 80041612 × 50 giving us 4002080600
+ 80041612 × 300 yielding 24012483600
+ 80041612 × 3000 which equals 240124836000
+ 80041612 × 50000 producing 4002080600000
+ 80041612 × 100000 that results in 8004161200000
+ 80041612 × 9000000 that results in 720374508000000
+ 80041612 × 80000000 what gives us 6403328960000000

= 7135978249408260
