Alright, let's work through 71979385 times 10407292 step by step
71979385 × 10407292 = 10407292 × (71979385)
+ 10407292 × 5 producing 52036460
+ 10407292 × 80 resulting in 832583360
+ 10407292 × 300 resulting in 3122187600
+ 10407292 × 9000 that results in 93665628000
+ 10407292 × 70000 which equals 728510440000
+ 10407292 × 900000 resulting in 9366562800000
+ 10407292 × 1000000 which equals 10407292000000
+ 10407292 × 70000000 yielding 728510440000000

= 749110477675420
