There used to be 16 liters of water in the fish tank, first pump out 8500 ml of water, then add 9300 ml of water, how much water is in the fish tank now?
鱼缸里原来有16升水，先抽出8500毫升水，又加入9300毫升水，现在鱼缸里有多少水？
<gadget id="calculator">16 * 1_000</gadget>
<output>16_000</output>

<gadget id="calculator">16_000 - 8_500</gadget>
<output>7_500</output>

<gadget id="calculator">7_500 + 9_300</gadget>
<output>16_800</output>

<result>16_800</result>