Alright, let's work through 71973708 times 7645175 step by step
71973708 × 7645175 = 7645175 × (71973708)
+ 7645175 × 8 giving us 61161400
+ 7645175 × 00 which equals 0
+ 7645175 × 700 what gives us 5351622500
+ 7645175 × 3000 producing 22935525000
+ 7645175 × 70000 what gives us 535162250000
+ 7645175 × 900000 resulting in 6880657500000
+ 7645175 × 1000000 producing 7645175000000
+ 7645175 × 70000000 that results in 535162250000000

= 550251593058900
