Wang Li set off from the school to the Xinhua Bookstore in the county. It took 3 hours to go there at a speed of 34 kilometers per hour, and it took 2 hours to return. What was the speed when she returned?
王丽从学校出发去县新华书店，去时速度每小时34千米，用了3小时，返回时用了2小时，那么返回时速度是多少？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">34 * (3/2)</gadget>
<output>51</output>

<result>51</result>