During the "May 1st" seven-day long holiday, father and mother took their daughter Xiaofang, who is in the second grade of elementary school, to visit the park. The tickets cost 22.5 yuan. It is known that the price of one adult ticket is equal to the price of two children's tickets, and one adult ticket How much is the fare?
"五•一"七天长假，爸爸、妈妈带正在上小学二年级的女儿小芳去游公园，买门票共用去22.5元，已知一张大人票价钱与二张小孩票价相等，一张大人票价是多少元？
<gadget id="calculator">1 + 2 + 2</gadget>
<output>5</output>

<gadget id="calculator">22.5 / 5</gadget>
<output>4.5</output>

<gadget id="calculator">4.5 * 2</gadget>
<output>9</output>

<result>9</result>