Alright, let's work through 7976 times 7904 step by step
7976 × 7904 = 7904 × (7976)
+ 7904 × 6 that results in 47424
+ 7904 × 70 that equals 553280
+ 7904 × 900 resulting in 7113600
+ 7904 × 7000 that equals 55328000

= 63042304
