Dad bought a pair of table tennis rackets and a table tennis ball for 28.54 yuan, and a pair of table tennis rackets for 23.68 yuan. How much is a pair of table tennis rackets more expensive than a table tennis ball?
爸爸买一副乒乓球拍和一个乒乓球共用去28.54元，一副乒乓球拍23.68元．一副乒乓球拍比一个乒乓球贵多少元？
<gadget id="calculator">28.54 - 23.68</gadget>
<output>4.86</output>

<gadget id="calculator">23.68 - 4.86</gadget>
<output>18.82</output>

<result>18.82</result>