The answer depends on the units used for 21250: millimetres, inches, feet, metres, miles, light years, ... Since you have not bothered to provide that information, I cannot provide a sensible answer.
5 kilometers=500,000 centimeters
5.5 kilometers = 18,044.6194 feet.
2.5 kilometers = 2,500 meters
30 kilometers = 98,425.1969 feet
4000 kilometers = 13,123,359.6 feet.
423,000 kilometers is equal to 423,000,000 meters
how many centimeters are in 7.95 kilometers
1,971.47 kilometers.
171.87 kilometers
5 kilometers
2.5 kilometers
1 inch = 0.0000254 kilometers
really? 1,000,000
67 592.448 kilometers
zero
5 meters = 0.005 kilometers
7 meters = 0.007 kilometers