(1/5) of a field is planted with tomatoes, and (3/5) is planted with eggplants, what fraction of the land is left?
一块地的(1/5)种西红柿，(3/5)种茄子，这块地还剩几分之几？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (1/5) - (3/5)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>