Teacher Li bought 14 fluorescent tubes at 12 yuan each. Teacher Li paid 200 yuan. How much should I get back?
李老师买了14根日光灯管，每根12元，李老师付了200元，应找回多少钱？
<gadget id="calculator">12 * 14</gadget>
<output>168</output>

<gadget id="calculator">200 - 168</gadget>
<output>32</output>

<result>32</result>