Xiaohong collected 24 specimens, and after giving 4 to Xiaofang, Xiaohong happened to belong to Xiaofang (4/5), how many specimens did Xiaofang have?
小红采集标本24件，送给小芳4件后，小红恰好是小芳的(4/5)，小芳原有多少件？
<gadget id="calculator">24 - 4</gadget>
<output>20</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">20 / (4/5)</gadget>
<output>25</output>

<gadget id="calculator">25 - 4</gadget>
<output>21</output>

<result>21</result>