The circumference of the base of half a cylinder is 10.28 cm and the height is 8 cm. What is its volume in cubic centimeters?
半个圆柱的底面周长是10.28厘米，高8厘米，它的体积是多少立方厘米．
<gadget id="calculator">3.14 / 2</gadget>
<output>1.57</output>

<gadget id="calculator">1 + 1.57</gadget>
<output>2.57</output>

<gadget id="calculator">10.28 / 2.57 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 4</gadget>
<output>50.24</output>

<result>50.24</result>