Xihe Farm cultivates fruit tree saplings in a piece of land. (2/5) of the land is planted with pear trees, (1/3) with peach trees, and the rest are planted with apple trees. What fraction of the land is occupied by apple trees?
西河农场在一块地里培育果树苗，这块地的(2/5)栽梨树，(1/3)栽桃树，剩下的栽苹果树．苹果树用地占这块地的几分之几？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (2/5) - (1/3)</gadget>
<output>4/15 = around 0.266667</output>

<result>4/15 = around 0.266667</result>