Li Ming went to Guangzhou with his father and mother. The one-way fare was only 80 yuan per person, half price for children. How much is the round trip transportation?
李明随爸爸和妈妈到广州玩，单程票价每人80元就，儿童半价．往返交通费要多少钱？
<gadget id="calculator">80 * 2</gadget>
<output>160</output>

<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<gadget id="calculator">160 + 40</gadget>
<output>200</output>

<gadget id="calculator">200 * 2</gadget>
<output>400</output>

<result>400</result>