Xiaojun collected some stamps, he first took out half of the stamps and gave them to his younger brother, and then his younger brother returned 4 stamps to him. At this time, Xiaojun still had 32 stamps. How many stamps did Xiaojun have?
小军收集了一些邮票，他先拿出了邮票的一半送给弟弟，后弟弟又还给他了4张．这时小军还有32张邮票，小军原来有多少张邮票？
<gadget id="calculator">32 - 4</gadget>
<output>28</output>

<gadget id="calculator">28 * 2</gadget>
<output>56</output>

<result>56</result>