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A light year.
Zero. A centigram is a unit of weight, equal to 0.01 grams. A kilometre is a unit of length, equal to 1000 metres.
The meter is a metric unit of length. Therefore, 300 meters has a length of 300 meters or .3 kilometers.
In the SI measurement system, a megameter is a unit of length that is equal to one million meters. A megameter also is equal to one thousand kilometers.
Hours are a unit of time; kilometers are a unit of length. But 927 kilometers are approximately 17.24 hours