A cylindrical granary has a base diameter of 4 meters measured from the inside and contains 3 meters of wheat. If each cubic meter of wheat weighs 0.7 tons, how many tons of wheat does this granary contain?
一个圆柱形的粮仓，从里面量得底面直径是4米，装有3米高的小麦，如果每立方米小麦重0.7吨，这个粮仓装有多少吨小麦？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 3</gadget>
<output>37.68</output>

<gadget id="calculator">0.7 * 37.68</gadget>
<output>26.376</output>

<result>26.376</result>