In the campus of Liuyin Street Elementary School, the number of willow trees used to account for (2/5) of the total number of trees in the school. This year, another 50 willow trees were planted. In this way, the number of willow trees accounted for (5) of the total number of trees in the school. /11), how many trees were there in Liuyin Street Primary School?
柳阴街小学的校园里，原来柳树的棵数是全校树木总棵数的(2/5)，今年又栽种了50棵柳树，这样，柳树的棵数就占全校树木总棵数的(5/11)，问柳阴街小学原来一共有多少棵树木？
<gadget id="calculator">11 - 5</gadget>
<output>6</output>

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

<gadget id="calculator">5 - 2</gadget>
<output>3</output>

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

<gadget id="calculator">(5/6) - (2/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">50 / (1/6)</gadget>
<output>300</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">300 / (3/5)</gadget>
<output>500</output>

<result>500</result>