The diameter of the base of a conical pile of wheat is 4 meters and the height is 1.5 meters. If wheat is packed into a cylindrical grain storage, it only accounts for (4/9) of the grain storage volume. It is known that the bottom area of the grain storage is 9 square meters, how many meters is the height of the grain storage?
圆锥形麦堆的底面直径是4米，高是1.5米．如果把小麦装入一个圆柱形的粮囤里，只占粮囤容积的(4/9)．已知粮囤的底面积是9平方米，粮囤高多少米？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3.14 * 4 * 1.5 * (1/3)</gadget>
<output>6.28</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">6.28 / (4/9) / 9</gadget>
<output>1.57</output>

<result>1.57</result>