Alright, let's work through 80446173 times 16311648 step by step
80446173 × 16311648 = 16311648 × (80446173)
+ 16311648 × 3 which equals 48934944
+ 16311648 × 70 giving us 1141815360
+ 16311648 × 100 which equals 1631164800
+ 16311648 × 6000 which equals 97869888000
+ 16311648 × 40000 that results in 652465920000
+ 16311648 × 400000 that equals 6524659200000
+ 16311648 × 0000000 what gives us 0
+ 16311648 × 80000000 that equals 1304931840000000

= 1312209656923104
