Alright, let's work through 71947131 times 67278760 step by step
71947131 × 67278760 = 67278760 × (71947131)
+ 67278760 × 1 yielding 67278760
+ 67278760 × 30 that equals 2018362800
+ 67278760 × 100 which equals 6727876000
+ 67278760 × 7000 that is equal 470951320000
+ 67278760 × 40000 resulting in 2691150400000
+ 67278760 × 900000 which equals 60550884000000
+ 67278760 × 1000000 what gives us 67278760000000
+ 67278760 × 70000000 that is equal 4709513200000000

= 4840513759237560
