Alright, let's work through 79875787 times 57249513 step by step
79875787 × 57249513 = 57249513 × (79875787)
+ 57249513 × 7 that is equal 400746591
+ 57249513 × 80 that equals 4579961040
+ 57249513 × 700 giving us 40074659100
+ 57249513 × 5000 that equals 286247565000
+ 57249513 × 70000 which equals 4007465910000
+ 57249513 × 800000 that equals 45799610400000
+ 57249513 × 9000000 resulting in 515245617000000
+ 57249513 × 70000000 giving us 4007465910000000

= 4572849906241731
