Teacher Wan bought a storybook for 18 yuan and a teaching book for 22 yuan in Xinhua Book City. He gave the salesperson 100 yuan. How much should he get back?
万老师在新华图书城买了一本故事书18元，一本教学用书22元，他给营业员100元，应找回多少元？
<gadget id="calculator">100 - 18 - 22</gadget>
<output>60</output>

<result>60</result>