Alright, let's work through 80323687 times 90879404 step by step
80323687 × 90879404 = 90879404 × (80323687)
+ 90879404 × 7 what gives us 636155828
+ 90879404 × 80 resulting in 7270352320
+ 90879404 × 600 giving us 54527642400
+ 90879404 × 3000 what gives us 272638212000
+ 90879404 × 20000 which equals 1817588080000
+ 90879404 × 300000 resulting in 27263821200000
+ 90879404 × 0000000 giving us 0
+ 90879404 × 80000000 which equals 7270352320000000

= 7299768801642548
