It costs 28.5 yuan to paint 1m**2 walls. How much does it cost to paint 1000m**2 walls?
粉刷1m**2墙面需要28.5元．要粉刷1000m**2墙面，共需多少钱？
<gadget id="calculator">28.5 * 1_000</gadget>
<output>28_500</output>

<result>28_500</result>