A cylindrical container with a bottom diameter of 30 cm contains some water. A block of iron is submerged in water and the water level rises by 1 cm. What is the volume of this iron block in cubic centimeters?
一个圆柱形容器，底面内直径是30厘米，容器中盛有一些水．把一个铁块浸没水中，水面上升了1厘米．这个铁块的体积是多少立方厘米？
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">15 ** 2</gadget>
<output>225</output>

<gadget id="calculator">3.14 * 225 * 1</gadget>
<output>706.5</output>

<result>706.5</result>