There are 3 liters of water in a jug, how much water is left in the jug after filling 5 cups with a capacity of 240 ml?
一个水壶里有3升水，倒满5个容量为240毫升的杯子后，水壶里还剩多少水？
<gadget id="calculator">3 * 1_000</gadget>
<output>3_000</output>

<gadget id="calculator">240 * 5</gadget>
<output>1_200</output>

<gadget id="calculator">3_000 - 1_200</gadget>
<output>1_800</output>

<result>1_800</result>