A conical pile of grain, the circumference of the bottom surface is 12.56 meters, and the height is 1 (1/2) of the radius. If each cubic meter weighs 750 kilograms, how many tons does this pile of grain weigh?
一圆锥形粮堆，底面周长12.56米，高是半径的1(1/2)，如果每立方米重750千克，这堆粮食重多少吨？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 * (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 * (1/2)</gadget>
<output>1</output>

<gadget id="calculator">1 / 1</gadget>
<output>1</output>

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

<gadget id="calculator">1 * 3.14 * 4 * 1 * 750</gadget>
<output>9_420</output>

<result>9_420</result>