A barrel of oil weighs 8 kilograms, and the barrel weighs 1000 grams. How many kilograms does the oil weigh?
一桶油连桶重8千克，桶重1000克，油重多少千克
<gadget id="calculator">1_000 / 1_000</gadget>
<output>1</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<result>7</result>