A cylindrical grain storehouse has a bottom diameter of 6 meters and contains wheat 2.5 meters high. If each cubic meter of wheat weighs 0.8 tons, how many tons of wheat does this grain storehouse contain?
一个圆柱形粮囤，底面直径6米，装有2.5米高的小麦，如果每立方米小麦重0.8吨，这个粮囤有小麦多少吨．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 2.5</gadget>
<output>70.65</output>

<gadget id="calculator">0.8 * 70.65</gadget>
<output>56.52</output>

<result>56.52</result>