Mom and Dad take Xiao Ling and her two classmates to go to the park. Adult tickets are 5 yuan each, and children tickets are 2.5 yuan each. How much is the total ticket price?
爸爸、妈妈带着小玲和她的两个同学去逛公园，成人票每张5元，儿童票每张2.5元，买门票一共需要多少元？
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">2.5 * 3</gadget>
<output>7.5</output>

<gadget id="calculator">10 + 7.5</gadget>
<output>17.5</output>

<result>17.5</result>