A cone of yellow sand has a bottom diameter of 4m and a height of 1.2m. Each cubic meter of yellow sand weighs 1.5 tons. How many tons does this pile of yellow sand weigh?
一圆锥形黄沙，底面直径4m，高1.2m，每立方米黄沙重1.5吨，这堆黄沙重多少吨．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

<gadget id="calculator">(1/3) * 3.14 * 4 * 1.2 * 1.5</gadget>
<output>7.536</output>

<result>7.536</result>