Alright, let's work through 68794519 times 72639531 step by step
68794519 × 72639531 = 72639531 × (68794519)
+ 72639531 × 9 that equals 653755779
+ 72639531 × 10 which equals 726395310
+ 72639531 × 500 which equals 36319765500
+ 72639531 × 4000 yielding 290558124000
+ 72639531 × 90000 that equals 6537557790000
+ 72639531 × 700000 that results in 50847671700000
+ 72639531 × 8000000 giving us 581116248000000
+ 72639531 × 60000000 resulting in 4358371860000000

= 4997201595530589
