Originally there were 15 liters of water in the fish tank, first 5000 ml was drawn out, and then 6000 ml was added. How much water is in the fish tank now?
鱼缸里原来有15升水，先抽出5000毫升后，又加入6000毫升．现在鱼缸里有多少水？
<gadget id="calculator">5_000 / 1_000</gadget>
<output>5</output>

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

<gadget id="calculator">6_000 / 1_000</gadget>
<output>6</output>

<gadget id="calculator">10 + 6</gadget>
<output>16</output>

<result>16</result>