Xiaodong originally had 33 stamps, and Xiaoliang gave 20% of his own stamps to Xiaodong. After the two had the same number of stamps, how many stamps did Xiaoliang have.
小东原有邮票33张，小亮把自己邮票的20%送给小东后两人的邮票数量相同，小亮原有多少张邮票．
<gadget id="calculator">0.8 - 0.2</gadget>
<output>0.6</output>

<gadget id="calculator">33 / 0.6</gadget>
<output>55</output>

<result>55</result>