Alright, let's work through 7815 times 3219 step by step
7815 × 3219 = 3219 × (7815)
+ 3219 × 5 yielding 16095
+ 3219 × 10 giving us 32190
+ 3219 × 800 resulting in 2575200
+ 3219 × 7000 that is equal 22533000

= 25156485
