There is a road with a length of 791 meters. After 13 days of repairing, there are still 245 meters left. How many meters are repaired per day on average?
有一条长791米的路，修了13天还剩245米．平均每天修多少米？
<gadget id="calculator">791 - 245</gadget>
<output>546</output>

<gadget id="calculator">546 / 13</gadget>
<output>42</output>

<result>42</result>