There is a cylindrical glass tank with a bottom diameter of 1dm, which is not full of water. An iron ball is placed in it. When the iron ball is completely immersed in the water, the water level rises by 1 cm. What is the volume of the iron ball in cubic centimeters?
有一个圆柱形玻璃缸，底面直径1dm，盛水未满，放入一个铁球，当铁球完全浸入水中之后，水面升高1cm，这个铁球体积是多少立方厘米？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">1 * 5</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25 * 1</gadget>
<output>78.5</output>

<result>78.5</result>