Alright, let's work through 2507 times 4545 step by step
2507 × 4545 = 4545 × (2507)
+ 4545 × 7 which equals 31815
+ 4545 × 00 giving us 0
+ 4545 × 500 giving us 2272500
+ 4545 × 2000 that is equal 9090000

= 11394315
