The orchard in Wuxing Township covers an area of 20 hectares, of which (1/5) is planted with apple trees, how many hectares are planted with apples?
五星乡果园占地20公顷，其中的(1/5)种苹果树，种苹果多少公顷？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">20 * (1/5)</gadget>
<output>4</output>

<result>4</result>