Alright, let's work through 1503 times 5215 step by step
1503 × 5215 = 5215 × (1503)
+ 5215 × 3 that is equal 15645
+ 5215 × 00 what gives us 0
+ 5215 × 500 producing 2607500
+ 5215 × 1000 producing 5215000

= 7838145
