30% of a road was repaired in the first week, 80 kilometers were repaired in the second week, and 60 kilometers remained. How many kilometers is this road?
一条路，第一周修了30%，第二周修了80千米，还剩60千米．这条路有多少千米？
<gadget id="calculator">60 + 80</gadget>
<output>140</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">140 / (7/10)</gadget>
<output>200</output>

<result>200</result>