A cylindrical pool has a bottom diameter of 1.8 meters and a depth of 2.5 meters. How many liters of water can this pool hold?
一个圆柱形水池，底面直径1.8米，深2.5米，这个水池能容水多少升？
<gadget id="calculator">1.8 / 2</gadget>
<output>0.9</output>

<gadget id="calculator">0.9 ** 2</gadget>
<output>0.81</output>

<gadget id="calculator">3.14 * 0.81 * 2.5 * 1_000</gadget>
<output>6_358.5</output>

<result>6_358.5</result>