Alright, let's work through 72138081 times 38117025 step by step
72138081 × 38117025 = 38117025 × (72138081)
+ 38117025 × 1 what gives us 38117025
+ 38117025 × 80 producing 3049362000
+ 38117025 × 000 which equals 0
+ 38117025 × 8000 that results in 304936200000
+ 38117025 × 30000 that is equal 1143510750000
+ 38117025 × 100000 yielding 3811702500000
+ 38117025 × 2000000 that results in 76234050000000
+ 38117025 × 70000000 what gives us 2668191750000000

= 2749689036929025
