Xiaojun has 40 stamps, which is (4/5) the number of Xiaofang's stamps. How many stamps does Xiaofang have? (solution by equation)
小军有40张邮票，是小芳邮票张数的(4/5)，小芳有多少张邮票？(用方程解)
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">40 / (4/5)</gadget>
<output>50</output>

<result>50</result>