Fill a glass with a bottom area of 15 square centimeters into a glass with a height of 3 cm. Now put a cylindrical iron block with a base radius of 2 cm and a height of 5 cm vertically into the glass. The water level rises how many centimeters? (calculate by taking 3 for π)
在一个底面积是15平方厘米的玻璃杯中装入高3厘米的水，现在把一个底面半径是2厘米，高是5厘米的圆柱形铁块垂直放入玻璃杯中，问水面升高了多少厘米？(π取3计算)
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">5 / 15</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 * 4 * (1/3)</gadget>
<output>4</output>

<result>4</result>