It has been 24 days to build a 4,500-meter road, with an average of 165 meters a day. How many meters are left to be repaired?
修一条4500米的路，已修了24天，平均每天修165米，还剩下多少米没有修？
<gadget id="calculator">165 * 24</gadget>
<output>3_960</output>

<gadget id="calculator">4_500 - 3_960</gadget>
<output>540</output>

<result>540</result>