A car drives 68 kilometers per hour, 4 hours in the morning and 5 hours in the afternoon. How many kilometers does the car drive in one day?
一辆汽车每小时行驶68千米，上午行驶4小时，下午行驶5小时，这辆汽车一天共行驶了多少千米？
<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">68 * 9</gadget>
<output>612</output>

<result>612</result>