Xiao Fang took the train with his father and mother to his grandfather's house. When buying the ticket, his father paid 100 yuan, and got 40 yuan back. Xiaofang's ticket is a student ticket, which is half of the adult ticket. Do you know how much the adult ticket is? Zhang?
小方与爸爸、妈妈一起坐火车到爷爷家，买车票时爸爸付了100元，找回40元，小方的票是学生票，学生票是成人票的一半，你知道成人票多少元一张吗？
<gadget id="calculator">100 - 40</gadget>
<output>60</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">60 / 5</gadget>
<output>12</output>

<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<result>24</result>