Alright, let's work through 53450709 times 91312341 step by step
53450709 × 91312341 = 91312341 × (53450709)
+ 91312341 × 9 that is equal 821811069
+ 91312341 × 00 producing 0
+ 91312341 × 700 producing 63918638700
+ 91312341 × 0000 that equals 0
+ 91312341 × 50000 giving us 4565617050000
+ 91312341 × 400000 that equals 36524936400000
+ 91312341 × 3000000 yielding 273937023000000
+ 91312341 × 50000000 producing 4565617050000000

= 4880709366899769
