Xiaohua has 126 stamps, and Xiaoliang has 84 stamps. How many stamps does Xiaohua give to Xiaoliang, will the two have the same number of stamps?
小华有126张邮票，小亮有84张邮票．小华给小亮多少张邮票，两人的邮票张数就相同了？
<gadget id="calculator">126 - 84</gadget>
<output>42</output>

<gadget id="calculator">42 / 2</gadget>
<output>21</output>

<result>21</result>