There is a piece of land where (3/7) grows cucumbers and (2/7) grows peppers. How much more land is there to grow cucumbers than to grow peppers?
有一块地，(3/7)种黄瓜，(2/7)种辣椒．种黄瓜的地比种辣椒多几分之几？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(3/7) - (2/7)</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>