Alright, let's work through 7858 times 522 step by step
7858 × 522 = 522 × (7858)
+ 522 × 8 that is equal 4176
+ 522 × 50 yielding 26100
+ 522 × 800 that is equal 417600
+ 522 × 7000 resulting in 3654000

= 4101876
