There are 12 bottles of milk in a carton, and each bottle of milk is 250ml. How many milliliters are there in this carton of milk?
一箱牛奶有12瓶，每瓶牛奶有250毫升，这箱牛奶一共多少毫升？
<gadget id="calculator">250 * 12</gadget>
<output>3_000</output>

<result>3_000</result>