The pine trees planted by the Young Pioneers on the hillside are 25% of the cypress trees. There are 150 fewer pine trees than the cypress trees. How many pine trees are there?
少先队员在山坡上栽的松树是柏树的25%，松树比柏树少150棵，松树多少棵？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">150 / (3/4)</gadget>
<output>200</output>

<gadget id="calculator">200 - 150</gadget>
<output>50</output>

<result>50</result>