The road construction team built a road of 15.5 meters on the first day, and the road repaired on the second day was 15 meters shorter than twice the road repaired on the first day. How many meters were built in two days?
修路队第一天修路15.5米，第二天修的路比第一天修的2倍少15米，两天共修了多少米？
<gadget id="calculator">15.5 * 2</gadget>
<output>31</output>

<gadget id="calculator">31 - 15</gadget>
<output>16</output>

<gadget id="calculator">16 + 15.5</gadget>
<output>31.5</output>

<result>31.5</result>