The Shunyuan road repair team built 64.5 kilometers of roads in the first week, 71.3 kilometers in the second week, and 35.8 kilometers less than the sum of the previous two weeks in the third week. How many kilometers were repaired in the third week?
顺源修路队，第一周修路64.5千米，第二周修路71.3千米，第三周修的比前两周的总和少35.8千米，第三周修了多少千米？
<gadget id="calculator">71.3 - 35.8</gadget>
<output>35.5</output>

<gadget id="calculator">64.5 + 35.5</gadget>
<output>100</output>

<result>100</result>