A table tennis ball costs 2.5 yuan, and a pair of table tennis bats costs 28 yuan. Now Xiaohua took 50 yuan and bought two table tennis balls and a pair of table tennis bats. How much money is left?
一个乒乓球2.5元钱，一副乒乓球拍28元钱，现在小华拿了50元钱，买了两个乒乓球和一副乒乓球拍，还剩多少钱？
<gadget id="calculator">2.5 * 2</gadget>
<output>5</output>

<gadget id="calculator">5 + 28</gadget>
<output>33</output>

<gadget id="calculator">50 - 33</gadget>
<output>17</output>

<result>17</result>