A cylindrical pool has a bottom diameter of 10 decimeters and a height of 2 decimeters. How many liters of water can this pool hold?
一个圆柱形水池，底面直径是10分米，高是2分米，这个水池可以装水多少升？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

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

<gadget id="calculator">3.14 * 25 * 2</gadget>
<output>157</output>

<result>157</result>