Li Ming and Zhang Bing each have several stamps. It is known that Li Ming’s stamps belong to Zhang Bing’s stamps (2/3). When Zhang Bing lends Li Ming 20 stamps, the ratio of the number of stamps between Li Ming and Zhang Bing is 3: 2. How many stamps do they have together?
李明和张兵各有邮票若干张，已知李明的邮票是张兵邮票的(2/3)，当张兵借给李明20张后，李明和张兵邮票张数的比是3：2，他们两人一共有邮票多少张？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">20 / (1/5)</gadget>
<output>100</output>

<result>100</result>