A conical sand pile has a bottom circumference of 62.8 meters and a height of 3 meters. If the sand weighs 20 tons per cubic meter and is transported by a truck with a load of 4 tons, how many times can the pile of sand be transported?
一个圆锥形沙堆，底面周长62.8米，高3米，如果每立方米沙重20吨，用一辆载重4吨的汽车运，几次可把这堆沙运完？
<gadget id="calculator">62.8 / 3.14 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

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

<gadget id="calculator">3.14 * 100 * 3 * (1/3)</gadget>
<output>314</output>

<gadget id="calculator">314 * 20</gadget>
<output>6_280</output>

<gadget id="calculator">6_280 / 4</gadget>
<output>1_570</output>

<result>1_570</result>