Alright, let's work through 3222 times 7715 step by step
3222 × 7715 = 7715 × (3222)
+ 7715 × 2 what gives us 15430
+ 7715 × 20 yielding 154300
+ 7715 × 200 that is equal 1543000
+ 7715 × 3000 that equals 23145000

= 24857730
