An express train departs from Sanya Bus Station at 9:30 in the morning and arrives in Haikou at 1:30 in the afternoon. This express train travels an average of 75 kilometers per hour. How many kilometers is it from Haikou to Sanya?
一辆快车上午9：30从三亚汽车站开出，下午1：30到达海口，这辆快车平均每小时行驶75千米，海口到三亚多少千米？
<gadget id="calculator">75 * 4</gadget>
<output>300</output>

<result>300</result>