The school wants to build a fence between the teaching area and the playground. The original plan was to use 35m2 of earth and rock. Later, a moon gate with a thickness of 25cm and a diameter of 2m was opened to reduce the amount of earth and rock. How many cubic meters of earth and rock are used now?
学校要在教学区和操场之间修一道围墙，原计划土石35m**2，后来多开了一个厚度为25cm，直径2m的月亮门，减少了土石的用量，现在用了多少立方米土石？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 0.25</gadget>
<output>0.785</output>

<gadget id="calculator">35 - 0.785</gadget>
<output>34.215</output>

<result>34.215</result>