There are 3 tons of coal in the cafeteria, which have been burned for 9 days, an average of 156 kg per day. How many kilograms of this batch of coal are left?
食堂有3吨煤，已经烧了9天，平均每天烧156千克．这批煤还剩多少千克？
<gadget id="calculator">3 * 1_000</gadget>
<output>3_000</output>

<gadget id="calculator">156 * 9</gadget>
<output>1_404</output>

<gadget id="calculator">3_000 - 1_404</gadget>
<output>1_596</output>

<result>1_596</result>