A straight cylindrical measuring cup with a bottom circumference of 6.28 cm contains half a cup of water. When a lead ball is immersed in the cup, the height of the water in the cup rises from 15 cm to 17 cm. What is the volume of the shot ball?
一个底面周长是6.28厘米的直圆柱量杯盛有半杯水，当把一个铅球浸在杯里时，杯中水的高度由15厘米上升到17厘米，请问这个铅球的体积是多少？
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">17 - 15</gadget>
<output>2</output>

<gadget id="calculator">3.14 * 1 * 2</gadget>
<output>6.28</output>

<result>6.28</result>