Alright, let's work through 7901 times 5638 step by step
7901 × 5638 = 5638 × (7901)
+ 5638 × 1 yielding 5638
+ 5638 × 00 that results in 0
+ 5638 × 900 giving us 5074200
+ 5638 × 7000 giving us 39466000

= 44545838
