A cylindrical cup with a volume of 15 liters is filled with water, and an iron cone with the same height as its bottom is poured into the water, how many liters of water is left in the cup?
一个容积为15升的圆柱体杯中盛满水，把一个与它等底等高的铁圆锥倒放入水中，杯中还有多少升水．
<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<result>10</result>