Alright, let's work through 79753999 times 82538787 step by step
79753999 × 82538787 = 82538787 × (79753999)
+ 82538787 × 9 that results in 742849083
+ 82538787 × 90 which equals 7428490830
+ 82538787 × 900 yielding 74284908300
+ 82538787 × 3000 which equals 247616361000
+ 82538787 × 50000 that is equal 4126939350000
+ 82538787 × 700000 producing 57777150900000
+ 82538787 × 9000000 which equals 742849083000000
+ 82538787 × 70000000 producing 5777715090000000

= 6582798335859213
