Uncle Zhang sent a cart of vegetables to the vegetable market at a speed of 44 km/h. It took 3 hours to deliver them, and only 2 hours to return them. What was the speed when they returned?
张大伯把一车蔬菜送到菜市场，去时的速度44千米/时，用了3小时送到，返回时只用了2小时，返回时的速度是多少？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">44 * (3/2)</gadget>
<output>66</output>

<result>66</result>