A cylindrical grain hoard has a bottom diameter of 6 meters and a height of 2.8 meters. If each cubic meter of wheat weighs 0.75 tons. How many tons of wheat can this grain store hold?
一个圆柱形粮囤，底面直径是6米，高是2.8米．如果每立方米小麦重0.75吨．这个粮囤大约能装小麦多少吨？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">3.14 * 9 * 2.8 * 0.75</gadget>
<output>59.346</output>

<result>59.346</result>