Xiao Ming and his father went to Ocean Park to play. Dad bought two tickets and shared a total of 97.5 yuan. The price of an adult ticket is twice that of a child. How much does it cost to buy a child ticket?
小明和爸爸去海洋公园玩，爸爸买了两张门票共用了97.5元钱，成人的票价是儿童的2倍，买一张儿童票用多少元？
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">97.5 / 3</gadget>
<output>32.5</output>

<result>32.5</result>