Alright, let's work through 72157495 times 87697727 step by step
72157495 × 87697727 = 87697727 × (72157495)
+ 87697727 × 5 giving us 438488635
+ 87697727 × 90 producing 7892795430
+ 87697727 × 400 which equals 35079090800
+ 87697727 × 7000 what gives us 613884089000
+ 87697727 × 50000 that equals 4384886350000
+ 87697727 × 100000 resulting in 8769772700000
+ 87697727 × 2000000 that is equal 175395454000000
+ 87697727 × 70000000 yielding 6138840890000000

= 6328048297513865
