Alright, let's work through 72436740 times 17900712 step by step
72436740 × 17900712 = 17900712 × (72436740)
+ 17900712 × 0 which equals 0
+ 17900712 × 40 what gives us 716028480
+ 17900712 × 700 yielding 12530498400
+ 17900712 × 6000 what gives us 107404272000
+ 17900712 × 30000 what gives us 537021360000
+ 17900712 × 400000 producing 7160284800000
+ 17900712 × 2000000 producing 35801424000000
+ 17900712 × 70000000 which equals 1253049840000000

= 1296669220958880
