bag of rice weighs 8 kilograms. The first time I ate 500 grams, and the second time I ate 2 kilograms. How many grams is less than the original bag of rice?
一袋大米重8千克，第一次吃了500克，第二次吃了2千克，现在这袋大米比原来少了多少克？
<gadget id="calculator">2 * 1_000</gadget>
<output>2_000</output>

<gadget id="calculator">500 + 2_000</gadget>
<output>2_500</output>

<result>2_500</result>