A construction site originally had 20 tons of cement, and 8,000 kilograms of cement was shipped in. How many kilograms of cement are there in this construction site now?
某建筑工地原有水泥20吨，又运来8000千克水泥，这个工地现在一共有多少千克水泥？
<gadget id="calculator">20 * 1_000</gadget>
<output>20_000</output>

<gadget id="calculator">20_000 + 8_000</gadget>
<output>28_000</output>

<result>28_000</result>