A jug of fruit juice weighs exactly 1 kg even with the jug. Given that the jug weighs 150 grams, what is the net weight of the jug in grams?
一壶果汁，连壶称正好1千克．已知壶重150克，这壶果汁的净含量是多少克．
<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 - 150</gadget>
<output>850</output>

<result>850</result>