As shown in the picture, a pile of wheat harvested in the experimental field is piled up into an approximate cone. The circumference of its bottom surface is 12.56 meters and the height is 1.5 meters. How much flour can this pile of wheat be ground? (The weight of wheat per cubic meter is about 740 kg, and the flour extraction rate is 70%)
如图是实验田收获的一堆小麦，堆成一个近似的圆锥，它的底面周长是12.56米，高1.5米，这堆小麦能磨多少面粉？(每立方米小麦约重740千克，出粉率70%)
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">740 * (1/3) * 3.14 * 4 * 1.5 * (7/10)</gadget>
<output>3_253.04</output>

<result>3_253.04</result>