Little Lamu and his father and mother went to Jinchuan to enjoy the pear blossoms on weekends. The one-way fare is 30.50 yuan per person, half price for children. How much is the round-trip transportation fee?
周末小拉姆和爸爸、妈妈去金川赏梨花，单程票价每人30.50元，儿童半价，往返交通费要用多少元？
<gadget id="calculator">30.5 / 2</gadget>
<output>15.25</output>

<gadget id="calculator">30.5 * 2</gadget>
<output>61</output>

<gadget id="calculator">15.25 + 61</gadget>
<output>76.25</output>

<gadget id="calculator">76.25 * 2</gadget>
<output>152.5</output>

<result>152.5</result>