(3/8) of a vegetable field is planted with radishes, the area planted with cabbage is the same as the area planted with radishes, and the rest is planted with spinach. What percentage of the whole vegetable field is grown with spinach?
一块菜地的(3/8)种了萝卜，种白菜的面积和种萝卜的面积同样多，剩下的种菠菜．种菠菜的地占整块菜地的几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(3/8) + (3/8)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>