There is a conical pile of sand with a base diameter of 3 meters and a height of 1.2 meters. If each cubic meter of sand weighs about 700 kilograms, how many kilograms does the pile of sand weigh?
有一个圆锥形的沙堆，底面直径是3米，高1.2米．如果每立方米的沙约重700千克，这堆沙重多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) ** 2</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">(1/3) * 3.14 * (9/4) * 1.2</gadget>
<output>2.826</output>

<gadget id="calculator">2.826 * 700</gadget>
<output>1_978.2</output>

<result>1_978.2</result>