Alright, let's work through 1809 times 500 step by step
1809 × 500 = 500 × (1809)
+ 500 × 9 giving us 4500
+ 500 × 00 what gives us 0
+ 500 × 800 that is equal 400000
+ 500 × 1000 yielding 500000

= 904500
