Gao Gao has 7 New Year cards, and after he gave Xing Xing 2 cards, they both have the same number of cards. How many New Year cards did Xingxing have?
高高有7张贺年片，他给兴兴2张贺年片后，他俩的贺年片数一样多．兴兴原来有几张贺年片？
<gadget id="calculator">7 - 2 - 2</gadget>
<output>3</output>

<result>3</result>