Alright, let's work through 72840505 times 73458850 step by step
72840505 × 73458850 = 73458850 × (72840505)
+ 73458850 × 5 giving us 367294250
+ 73458850 × 00 that equals 0
+ 73458850 × 500 that equals 36729425000
+ 73458850 × 0000 which equals 0
+ 73458850 × 40000 which equals 2938354000000
+ 73458850 × 800000 that results in 58767080000000
+ 73458850 × 2000000 producing 146917700000000
+ 73458850 × 70000000 which equals 5142119500000000

= 5350779730719250
