Alright, let's work through 85308305 times 98947513 step by step
85308305 × 98947513 = 98947513 × (85308305)
+ 98947513 × 5 resulting in 494737565
+ 98947513 × 00 resulting in 0
+ 98947513 × 300 what gives us 29684253900
+ 98947513 × 8000 producing 791580104000
+ 98947513 × 00000 yielding 0
+ 98947513 × 300000 yielding 29684253900000
+ 98947513 × 5000000 resulting in 494737565000000
+ 98947513 × 80000000 yielding 7915801040000000

= 8441044617995465
