Alright, let's work through 5103 times 9007 step by step
5103 × 9007 = 9007 × (5103)
+ 9007 × 3 yielding 27021
+ 9007 × 00 that is equal 0
+ 9007 × 100 yielding 900700
+ 9007 × 5000 giving us 45035000

= 45962721
