Alright, let's work through 7904 times 357 step by step
7904 × 357 = 357 × (7904)
+ 357 × 4 what gives us 1428
+ 357 × 00 giving us 0
+ 357 × 900 that equals 321300
+ 357 × 7000 that equals 2499000

= 2821728
