In a vegetable field, (5/8) grows cabbage, (1/8) grows celery, and the rest grows radish. How much of the whole vegetable field is planted with radishes?
一块菜地，其中的(5/8)种白菜，(1/8)种芹菜，剩下的种萝卜．种萝卜的地占整块菜地的多少．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (5/8) - (1/8)</gadget>
<output>1/4 = around 0.25</output>

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