Alright, let's work through 80985325 times 10442485 step by step
80985325 × 10442485 = 10442485 × (80985325)
+ 10442485 × 5 that results in 52212425
+ 10442485 × 20 yielding 208849700
+ 10442485 × 300 yielding 3132745500
+ 10442485 × 5000 that is equal 52212425000
+ 10442485 × 80000 that is equal 835398800000
+ 10442485 × 900000 that equals 9398236500000
+ 10442485 × 0000000 that results in 0
+ 10442485 × 80000000 which equals 835398800000000

= 845688041532625
