conical wheat pile has a bottom circumference of 12.56 meters and a height of 1.5 meters. Now it is shipped by a miniature truck. Each time 1.57 cubic meters can be transported. How many times can it be finished?
一个圆锥形麦堆，底面周长是12.56米，高是1.5米，现在用一种微型货车来装运，每次运1.57立方米，几次可以运完？
<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">(1/3) * 3.14 * 4 * 1.5</gadget>
<output>6.28</output>

<gadget id="calculator">6.28 / 1.57</gadget>
<output>4</output>

<result>4</result>