Alright, let's work through 6378 times 7439 step by step
6378 × 7439 = 7439 × (6378)
+ 7439 × 8 giving us 59512
+ 7439 × 70 producing 520730
+ 7439 × 300 that equals 2231700
+ 7439 × 6000 producing 44634000

= 47445942
