The apple trees planted in the orchard are pear trees (5/7), 2100 pear trees are planted, how many apple trees are planted?
果园里种的苹果树是梨树的(5/7)，种了2100棵梨树，种了多少棵苹果树？
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">2_100 * (5/7)</gadget>
<output>1_500</output>

<result>1_500</result>