The number of stamps that Xiaoli has is 20 times that of Xiaoqiang. If Xiaoli gives Xiaoqiang 285 stamps, it will be the same for both of them. How many stamps does Xiaoli have?
小丽的邮票张数是小强的20倍，如果小丽给小强285张两人就同样多，问小丽原来有多少张邮票？
<gadget id="calculator">285 * 2</gadget>
<output>570</output>

<gadget id="calculator">20 - 1</gadget>
<output>19</output>

<gadget id="calculator">570 / 19</gadget>
<output>30</output>

<gadget id="calculator">30 * 20</gadget>
<output>600</output>

<result>600</result>