In the South-to-North Water Diversion Project, a section of 975 kilometers of canals will be built. The first group will build 234 kilometers, the second group will repair 326 kilometers, and the rest will be repaired by the third group. How many kilometers will the third group repair?
南水北调工程中，要修一段975千米的水渠，第一组修了234千米，第二组修了326千米，剩下的由第三组修，第三组要修多少千米？
<gadget id="calculator">975 - 234 - 326</gadget>
<output>415</output>

<result>415</result>