There is a 20m**2 corn field in the school’s biological garden, and the area for planting corn is 4/5 of that used for cabbage. How much is the m**2 for cabbage?
学校生物园里有玉米地20m**2，种玉米的面积是种白菜的(4/5)，种白菜多少m**2？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

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

<result>25</result>