The school extracurricular group makes 50 red flowers, the number of white flowers is red flowers (2/5), and yellow flowers (4/5), how many yellow flowers are there?
学校课外小组做红花50朵，白花的朵数是红花的(2/5)，又是黄花的(4/5)，黄花有多少朵？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(2/5) / (4/5)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">50 * (1/2)</gadget>
<output>25</output>

<result>25</result>