The road construction team has built a road and has already built 180 meters. The remaining meters are exactly four times the repaired. The remaining meters will be completed in 9 days. How many meters are repaired per day on average?
修路队修一条路，已经修了180米，剩下的米数正好是修了的4倍，剩下的要在9天修完，平均每天修多少米？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">180 * (4/9)</gadget>
<output>80</output>

<result>80</result>