A cylindrical cistern has a bottom circumference of 25.12 meters, a depth of 2.4 meters, and a water surface 0.9 meters above the ground. How many tons of water does the cistern store? (1 cubic meter of water weighs 1 ton)
一个圆柱形蓄水池，底面周长是25.12米，深是2.4米，水面离地面0.9米，蓄水池蓄水多少吨？(1立方米的水重1吨)
<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">2.4 - 0.9</gadget>
<output>1.5</output>

<gadget id="calculator">3.14 * 16 * 1.5 * 1</gadget>
<output>75.36</output>

<result>75.36</result>