A tofu workshop shipped 1,800 kilograms of soybeans. If an average of 140 kilograms of soybeans are used to make tofu every day, after 11 days, how many kilograms of soybeans are left?
一个豆腐坊运来1800千克黄豆，如果平均每天用140千克黄豆做豆腐，经过11天，还剩多少千克黄豆？
<gadget id="calculator">140 * 11</gadget>
<output>1_540</output>

<gadget id="calculator">1_800 - 1_540</gadget>
<output>260</output>

<result>260</result>