Alright, let's work through 72458782 times 56872348 step by step
72458782 × 56872348 = 56872348 × (72458782)
+ 56872348 × 2 what gives us 113744696
+ 56872348 × 80 yielding 4549787840
+ 56872348 × 700 yielding 39810643600
+ 56872348 × 8000 that is equal 454978784000
+ 56872348 × 50000 that is equal 2843617400000
+ 56872348 × 400000 that is equal 22748939200000
+ 56872348 × 2000000 that results in 113744696000000
+ 56872348 × 70000000 that results in 3981064360000000

= 4120901065560136
