Uncle Li brought 600 yuan to buy 20 table tennis rackets for the table tennis team, leaving 40 yuan. How much does each table tennis racket cost?
李叔叔带了600元钱，给乒乓球组买20个乒乓球拍，还剩下40元．每副乒乓球拍要多少元？
<gadget id="calculator">600 - 40</gadget>
<output>560</output>

<gadget id="calculator">560 / 20</gadget>
<output>28</output>

<result>28</result>