There are 180 peach trees in the orchard. Apple trees are more than peach trees (1/6) and less than pear trees (1/4). How many pear trees are there?
果园里有180棵桃树，苹果树比桃树多(1/6)，又比梨树少(1/4)，梨树有多少棵？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 + (1/6)</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(7/6) / (3/4)</gadget>
<output>14/9 = around 1.555556</output>

<gadget id="calculator">180 * (14/9)</gadget>
<output>280</output>

<result>280</result>