The engineering team repairs a road with an average of 450 meters per day. After 19 days, 720 meters remain unrepaired. How long is this road in meters?
工程队修一条公路，平均每天修450米，19天后还剩720米未修，这条公路全长多少米？
<gadget id="calculator">450 * 19</gadget>
<output>8_550</output>

<gadget id="calculator">8_550 + 720</gadget>
<output>9_270</output>

<result>9_270</result>