The number of plum trees in an orchard is (7/8) that of peach trees, and the number of peach trees is (5/6) that of pear trees. It is known that there are 1680 plum trees, how many pear trees are there?
一个果园的李树棵数是桃树的(7/8)，桃树棵数是梨树的(5/6)．已知李树有1680棵，梨树有多少棵？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1_680 / (7/8) / (5/6)</gadget>
<output>2_304</output>

<result>2_304</result>