Alright, let's work through 85413341 times 80853203 step by step
85413341 × 80853203 = 80853203 × (85413341)
+ 80853203 × 1 producing 80853203
+ 80853203 × 40 yielding 3234128120
+ 80853203 × 300 that is equal 24255960900
+ 80853203 × 3000 resulting in 242559609000
+ 80853203 × 10000 what gives us 808532030000
+ 80853203 × 400000 giving us 32341281200000
+ 80853203 × 5000000 resulting in 404266015000000
+ 80853203 × 80000000 yielding 6468256240000000

= 6905942198781223
