There are a cylinder and a cone model in the laboratory, both of which have a base diameter of 20 cm and a height of 15 cm, what is their total volume in cubic centimeters?
实验室里有一个圆柱和一个圆锥模型，它们底面直径都是20厘米，高都是15厘米，它们的体积一共是多少立方厘米．
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

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

<gadget id="calculator">3.14 * 100 * 15</gadget>
<output>4_710</output>

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

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

<gadget id="calculator">4_710 + 1_570</gadget>
<output>6_280</output>

<result>6_280</result>