The cafeteria bought back 12.5 kilograms of peanut oil, and the price per kilogram of peanut oil was 9.8 yuan. The buyer paid the cashier 150 yuan, how much should I get back?
食堂买回12.5千克花生油，每千克花生油的售价是9.8元．采购员付给收银员150元，应找回多少钱？
<gadget id="calculator">9.8 * 12.5</gadget>
<output>122.5</output>

<gadget id="calculator">150 - 122.5</gadget>
<output>27.5</output>

<result>27.5</result>