Hongguang Factory originally had 3 tons of coal. If it burns 105 kilograms per day, how many kilograms will be left after 9 days of burning?
红光工厂原有煤3吨，如果每天烧105千克，烧了9天后，还剩多少千克？
<gadget id="calculator">3 * 1_000</gadget>
<output>3_000</output>

<gadget id="calculator">105 * 9</gadget>
<output>945</output>

<gadget id="calculator">3_000 - 945</gadget>
<output>2_055</output>

<result>2_055</result>