A water cup measures 10 cm in diameter from the inside and 15 cm in height. The water surface in the cup is 5 cm from the mouth of the cup. How many milliliters of water is in the cup?
一个水杯从里面量底面直径10厘米，高15厘米，杯里的水面离杯口5厘米，这个杯子里有水多少毫升？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

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

<gadget id="calculator">15 - 5</gadget>
<output>10</output>

<gadget id="calculator">3.14 * 25 * 10</gadget>
<output>785</output>

<result>785</result>