cylindrical glass fish tank with a bottom diameter of 20 cm. When a small fish is taken out, the water level drops by 2 cm. Then a large fish is put in, and the water level rises by 3 cm. What is the volume of the big fish in cubic centimeters larger than the small fish?
圆柱形玻璃鱼缸，底面直径20厘米，把里面的一条小鱼捞出来后水面下降2厘米，后又放入一条大鱼，水面上升3厘米，大鱼比小鱼的体积大多少立方厘米．
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 3</gadget>
<output>942</output>

<gadget id="calculator">3.14 * 100 * 2</gadget>
<output>628</output>

<gadget id="calculator">942 - 628</gadget>
<output>314</output>

<result>314</result>