Kobayashi went on an outing by bicycle. He traveled an average of 12 kilometers per hour when going there, and arrived in (2/3) hours. It took only (1/2) hour to return by the original road. How many kilometers per hour did he travel on average when he returned?
小林骑自行车去郊游，去时平均每小时行12千米，(2/3)小时到达，原路返回时只用了(1/2)小时，返回时平均每小时行多少千米？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(2/3) / (1/2)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">12 * (4/3)</gadget>
<output>16</output>

<result>16</result>