Alright, let's work through 72458560 times 31757060 step by step
72458560 × 31757060 = 31757060 × (72458560)
+ 31757060 × 0 which equals 0
+ 31757060 × 60 producing 1905423600
+ 31757060 × 500 that is equal 15878530000
+ 31757060 × 8000 resulting in 254056480000
+ 31757060 × 50000 resulting in 1587853000000
+ 31757060 × 400000 what gives us 12702824000000
+ 31757060 × 2000000 giving us 63514120000000
+ 31757060 × 70000000 that results in 2222994200000000

= 2301070837433600
