Alright, let's work through 1507 times 1075 step by step
1507 × 1075 = 1075 × (1507)
+ 1075 × 7 resulting in 7525
+ 1075 × 00 yielding 0
+ 1075 × 500 producing 537500
+ 1075 × 1000 that is equal 1075000

= 1620025
