The rice is 1.5 yuan per kilogram. Xiaoming's mother bought 35 kilograms. She paid the salesperson 60 yuan. How much should I get back?
大米每千克1.5元，小明的妈妈买了35千克，她付给营业员60元，应找回多少钱？
<gadget id="calculator">1.5 * 35</gadget>
<output>52.5</output>

<gadget id="calculator">60 - 52.5</gadget>
<output>7.5</output>

<result>7.5</result>