Uncle Li went from the greenhouse to the farmer's market to deliver vegetables. It took 3 hours to go at a speed of 40 km/h, and it took 2 hours to return. How many kilometers per hour did you travel when you returned from the original road?
李叔叔从大棚去农贸市场送蔬菜，去的速度是40千米/时，用了3小时，返回时用了2小时．原路返回时每小时行多少千米？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">40 * (3/2)</gadget>
<output>60</output>

<result>60</result>