To build a road, 30% of the road was built on the first day, 18 meters were repaired on the second day, and 60% of the road was not repaired. How many meters is this road?
修一条路，第一天修了30%，第二天修了18米，还剩60%没有修，这条路有多少米？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/10) - (3/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">18 / (1/10)</gadget>
<output>180</output>

<result>180</result>