A bottle of jam weighs 1 kilogram. From the label, it can be seen that the "net content" of this bottle of jam is 880 grams. How many grams does the bottle weigh?
一瓶果酱连瓶重1千克，从标签上可以看出这瓶果酱的"净含量"是880克，瓶重多少克？
<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 - 880</gadget>
<output>120</output>

<result>120</result>