Xiaohong collected a total of 867 stamps. If she collected 231 more stamps, it would be exactly three times that of Xiaolan's collection of stamps. How many stamps does Xiaolan collect?
小红共收集邮票867张，如果再多收集231张，就正好是小兰收集邮票的3倍．小兰收集的邮票有多少张？
<gadget id="calculator">867 + 231</gadget>
<output>1_098</output>

<gadget id="calculator">1_098 / 3</gadget>
<output>366</output>

<result>366</result>