Xiaojun collected some stamps. He took out half of the stamps and gave one more to Xiaogang. He still had 30 stamps. How many stamps did Xiaojun have?
小军收集了一些邮票，他拿出邮票的一半还多1张送给了小刚，自己还有30张，小军原来有多少张邮票．
<gadget id="calculator">1 + 30</gadget>
<output>31</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">31 / (1/2)</gadget>
<output>62</output>

<result>62</result>