There are 200 poplars in the campus, the poplars are willows (2/3), the cypresses are willows (7/10), how many cypresses are there?
校园里有杨树200棵，杨树是柳树的(2/3)，柏树是柳树的(7/10)，柏树有多少棵？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">200 / (2/3)</gadget>
<output>300</output>

<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">300 * (7/10)</gadget>
<output>210</output>

<result>210</result>