Alright, let's work through 71040862 times 51997690 step by step
71040862 × 51997690 = 51997690 × (71040862)
+ 51997690 × 2 resulting in 103995380
+ 51997690 × 60 what gives us 3119861400
+ 51997690 × 800 yielding 41598152000
+ 51997690 × 0000 giving us 0
+ 51997690 × 40000 resulting in 2079907600000
+ 51997690 × 000000 producing 0
+ 51997690 × 1000000 giving us 51997690000000
+ 51997690 × 70000000 that equals 3639838300000000

= 3693960719608780
