The road construction team built 161 kilometers of roads in the fourth quarter, an increase of 15% over the third quarter. How many kilometers of roads were built in the two quarters?
筑路队第四季度筑路161千米，比第三季度增加15%，两季度共筑路多少千米？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">161 / (23/20)</gadget>
<output>140</output>

<gadget id="calculator">161 + 140</gadget>
<output>301</output>

<result>301</result>