A car travels from A to B at a speed of 57 kilometers per hour, takes 4 hours, and only takes 3 hours to return. How many kilometers does the car travel per hour when it returns?
一辆汽车从甲地开往乙地，去时的速度是每小时57千米，共用4小时，返回时只用3小时，这辆汽车返回时每小时行多少千米？
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">57 * (4/3)</gadget>
<output>76</output>

<result>76</result>