An orchard with an area of (9/10) hectares, of which (1/2) is planted with apple trees, (1/5) is planted with pear trees, and the rest are planted with peach trees. The area of peach trees is a fraction of the land ?
一块面积是(9/10)公顷的果园，其中的(1/2)种苹果树，(1/5)种梨树，其余种桃树，桃树的面积是这块地的几分之几？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/2) - (1/5)</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>