Alright, let's work through 80136518 times 51555322 step by step
80136518 × 51555322 = 51555322 × (80136518)
+ 51555322 × 8 which equals 412442576
+ 51555322 × 10 that is equal 515553220
+ 51555322 × 500 giving us 25777661000
+ 51555322 × 6000 resulting in 309331932000
+ 51555322 × 30000 that is equal 1546659660000
+ 51555322 × 100000 yielding 5155532200000
+ 51555322 × 0000000 resulting in 0
+ 51555322 × 80000000 that equals 4124425760000000

= 4131463989448796
