To build a road, the uncle of the worker repaired 75 meters a day. After 8 days of repairing, there are still 30 meters left to be repaired. How long is this road?
修一条公路，工人叔叔每天修75米，修了8天，还剩30米没修，这条公路长多少米？
<gadget id="calculator">75 * 8</gadget>
<output>600</output>

<gadget id="calculator">600 + 30</gadget>
<output>630</output>

<result>630</result>