A can of peanut oil weighs 1 kg with the oil in the tank, and the oil tank weighs 100 grams. How much does the peanut oil weigh in grams?
一罐花生油连罐带油重1千克，油罐重100克，花生油重多少克
<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 - 100</gadget>
<output>900</output>

<result>900</result>