Mom took Xiaohong to the park. The price of a child ticket is 13.5 yuan, and the price of an adult ticket is 2.4 times that of a child ticket. How much does it cost to buy tickets?
妈妈带小红去公园游玩，儿童票是13.5元一张，成人票的价格是儿童票价的2.4倍．买门票一共需要多少钱？
<gadget id="calculator">13.5 * 2.4</gadget>
<output>32.4</output>

<gadget id="calculator">32.4 + 13.5</gadget>
<output>45.9</output>

<result>45.9</result>