Among the stamps collected by Xiaoxuan, landscape stamps account for 45%, and character stamps account for 20%. If there are 50 more landscape stamps than character stamps, how many stamps does she have in total?
小璇收集的邮票中，风景邮票占45%，人物邮票占20%．如果风景邮票比人物邮票多50枚，她收集的邮票一共有多少枚？
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(9/20) - (1/5)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">50 / (1/4)</gadget>
<output>200</output>

<result>200</result>