In a vegetable field, (1/5) is planted with eggplant, (2/3) is planted with cucumber, and the rest is planted with spinach. What percentage of the area is planted with spinach?
一块菜地，(1/5)种茄子，(2/3)种黄瓜，其余的种菠菜，种菠菜的面积占这块地的几分之几？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(1/5) + (2/3)</gadget>
<output>13/15 = around 0.866667</output>

<gadget id="calculator">1 - (13/15)</gadget>
<output>2/15 = around 0.133333</output>

<result>2/15 = around 0.133333</result>