The ratio of Mingming and Liangliang stamps is 2:5, Liangliang has 60 stamps more than Mingming, how many stamps does Mingming have.
明明和亮亮邮票的比是2：5，亮亮比明明多60张邮票，明明有多少张邮票．
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">60 / 3</gadget>
<output>20</output>

<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<result>40</result>