car travels an average of 42 kilometers per hour in a day. It is known that the car has traveled for 4 hours in the morning, with an average travel of 50 kilometers per hour, and an average of 37 kilometers per hour in the afternoon. How many hours has the car traveled in the afternoon?
一辆车一天中平均每小时行驶42千米，已知这辆汽车上午行驶了4小时，平均每小时行驶50千米，下午平均每小时行驶37千米，这辆汽车下午行驶了多少小时．
<gadget id="calculator">50 * 4</gadget>
<output>200</output>

<gadget id="calculator">42 * 4</gadget>
<output>168</output>

<gadget id="calculator">200 - 168</gadget>
<output>32</output>

<gadget id="calculator">42 - 37</gadget>
<output>5</output>

<gadget id="calculator">32 / 5</gadget>
<output>32/5 = around 6.4</output>

<result>32/5 = around 6.4</result>