The ratio of Mingming and Liangliang stamps is 2:5, Liangliang has 40 stamps, how many stamps does Mingming have?
明明和亮亮邮票的比是2：5，亮亮有40张邮票，明明有多少张邮票．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">40 * (2/5)</gadget>
<output>16</output>

<result>16</result>