There are approximately 2.205 pounds in 1KG.
Therefore, for every 1 KG there are 2.205 pounds.
Hence you need to multiply the amount in kilograms by 2.205 or 2.2.
500 x2.205 = 1102.5
This answer is closes to the true value however for simplicity most people would just multiply by 2.2 and get 1100.
So,
Most accurate - 1102.5
Simplest - 1100
Unless the question specifically asked for no decimal points, to be safe I would use 1102.5
