Dad drove for an outing. The speed was 50 kilometers per hour when he went there. He drove for 6 hours and only took 5 hours when he came back. How many kilometers per hour did he go back?
爸爸开车去郊游，去的时候速度是每小时50千米，行了6小时，回来的时候只用了5个小时，回来的速度是每小时多少千米？
<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">50 * (6/5)</gadget>
<output>60</output>

<result>60</result>