Alright, let's work through 7974 times 638 step by step
7974 × 638 = 638 × (7974)
+ 638 × 4 which equals 2552
+ 638 × 70 that is equal 44660
+ 638 × 900 resulting in 574200
+ 638 × 7000 that results in 4466000

= 5087412
