Lan Lan and Liangliang each have some stamps. It is known that Lan Lan's stamps account for 60% of the total number of them. When Lan Lan lends Liangliang 20 stamps, the ratio of Lan Lan and Liangliang's stamps is 2:3 ． How many stamps do they share?
兰兰和亮亮各有一些邮票，已知兰兰的邮票数占两人总数的60%，当兰兰借给亮亮20张后，兰兰和亮亮邮票张数的比是2：3．两人共有邮票多少张？
<gadget id="calculator">60 / 100</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>