In a rectangular vegetable plot of Xiaohua’s family, cabbage, radish, and green vegetables were planted respectively. (1/5) of this vegetable plot was used for planting cabbage, (2/5) of this vegetable plot was used for planting radish, and the rest Vegetables are grown, and vegetables account for a fraction of this vegetable field.
小华家的一块长方形菜地里分别种了白菜、萝卜、青菜，种白菜用了这块菜地的(1/5)，种萝卜用了这块菜地的(2/5)，其余的种青菜，青菜占这块菜地的几分之几．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/5) + (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>