There is a conical pile of sand with a base diameter of 4 meters and a height of 1.2 meters. If each cubic meter of sand weighs about 700 kilograms, how many tons does this pile of sand weigh?
有一个圆锥形的沙堆，底面直径是4米，高1.2米．如果每立方米的沙约重700千克，这堆沙重多少吨？
<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">700 / 1_000</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 1.2 * (7/10)</gadget>
<output>3.5168</output>

<result>3.5168</result>