Alright, let's work through 85389520 times 4009113 step by step
85389520 × 4009113 = 4009113 × (85389520)
+ 4009113 × 0 which equals 0
+ 4009113 × 20 giving us 80182260
+ 4009113 × 500 yielding 2004556500
+ 4009113 × 9000 which equals 36082017000
+ 4009113 × 80000 which equals 320729040000
+ 4009113 × 300000 yielding 1202733900000
+ 4009113 × 5000000 yielding 20045565000000
+ 4009113 × 80000000 which equals 320729040000000

= 342336234695760
