Alright, let's work through 71573642 times 18680823 step by step
71573642 × 18680823 = 18680823 × (71573642)
+ 18680823 × 2 yielding 37361646
+ 18680823 × 40 resulting in 747232920
+ 18680823 × 600 resulting in 11208493800
+ 18680823 × 3000 which equals 56042469000
+ 18680823 × 70000 what gives us 1307657610000
+ 18680823 × 500000 which equals 9340411500000
+ 18680823 × 1000000 yielding 18680823000000
+ 18680823 × 70000000 which equals 1307657610000000

= 1337054537667366
