Alright, let's work through 79697504 times 491992 step by step
79697504 × 491992 = 491992 × (79697504)
+ 491992 × 4 giving us 1967968
+ 491992 × 00 giving us 0
+ 491992 × 500 giving us 245996000
+ 491992 × 7000 that results in 3443944000
+ 491992 × 90000 yielding 44279280000
+ 491992 × 600000 yielding 295195200000
+ 491992 × 9000000 producing 4427928000000
+ 491992 × 70000000 that equals 34439440000000

= 39210534387968
