In People's Park, every willow tree is like a poplar tree (2/3). Another 50 willows are planted this year, so that one willow will account for all (5/11). How many original trees were there in the People's Park?
人民公园里柳树的棵树是杨树棵树的(2/3)．今年又种了50棵柳树，这样柳树的棵树就占全部的(5/11)．人民公园里原有树木多少棵？
<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">50 * (5/11)</gadget>
<output>250/11 = around 22.727273</output>

<gadget id="calculator">50 - (250/11)</gadget>
<output>300/11 = around 27.272727</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) * (5/11)</gadget>
<output>10/33 = around 0.30303</output>

<gadget id="calculator">(10/33) - (2/3)</gadget>
<output>-4/11 = around -0.363636</output>

<gadget id="calculator">(5/11) + (-4/11)</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">(300/11) / (1/11)</gadget>
<output>300</output>

<result>300</result>