A fence was built around the botanical garden of the school. The original plan was to use 60 cubic meters of earth and stones. Later, an extra moon gate with a thickness of 24cm and a diameter of 2m was opened to reduce the amount of earth and stones used. How many cubic meters of earth and rock were actually used?
学校植物园的周围修一道围墙，原计划用土石60立方米，后来多开了一个厚度为24cm，直径2m的月亮门，减少了土石的用量．实际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 * 0.24</gadget>
<output>0.7536</output>

<gadget id="calculator">60 - 0.7536</gadget>
<output>59.2464</output>

<result>59.2464</result>