In a rectangular vegetable plot, (2/7) grow cucumbers, (4/7) grow tomatoes, and the rest grow eggplants. What percentage of the plot do eggplants occupy?
一块长方形菜地，(2/7)种黄瓜，(4/7)种西红柿，剩下的种茄子．茄子占这块地的几分之几？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 - (2/7) - (4/7)</gadget>
<output>1/7 = around 0.142857</output>

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