There are 200 pear trees in the orchard, and there are (5/7) as many pear trees as there are apple trees. How many apple trees are there?
果园里有梨树200棵，梨树的棵数是苹果树的(5/7)．苹果树有多少棵？
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">200 / (5/7)</gadget>
<output>280</output>

<result>280</result>