A table tennis ball is 4 yuan, Xiao Liang bought 6 table tennis balls and a pair of rackets, and spent a total of 56 yuan. How much is a pair of rackets?
一个乒乓球4元，小亮买了6个乒乓球和一副球拍，一共花了56元．一副球拍多少元？
<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<gadget id="calculator">56 - 24</gadget>
<output>32</output>

<result>32</result>