4 carts of green vegetables are shipped from the vegetable market, each cart weighs 495 kg, and 836 kg are sold. How many kg of green vegetables are left?
菜场运来4车青菜，每车495千克，卖出836千克，还剩下多少千克青菜？
<gadget id="calculator">495 * 4</gadget>
<output>1_980</output>

<gadget id="calculator">1_980 - 836</gadget>
<output>1_144</output>

<result>1_144</result>