The diameter of the base of a cone is 20 cm and the height is 15 cm. What is its volume?
圆锥的底面直径是20厘米，高是15厘米，它的体积是多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

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

<gadget id="calculator">(1/3) * 3.14 * 100 * 15</gadget>
<output>1_570</output>

<result>1_570</result>