Alright, let's work through 6724678 times 76942371 step by step
6724678 × 76942371 = 76942371 × (6724678)
+ 76942371 × 8 producing 615538968
+ 76942371 × 70 that results in 5385965970
+ 76942371 × 600 that results in 46165422600
+ 76942371 × 4000 resulting in 307769484000
+ 76942371 × 20000 that equals 1538847420000
+ 76942371 × 700000 which equals 53859659700000
+ 76942371 × 6000000 that equals 461654226000000

= 517412669531538
