An engineering team built a 1,000-kilometer road, completed the full length (1/7) in the first week, completed the full length (2/5) in the second and third weeks, and left the full length What percentage of it has not been repaired?
某工程队修一条长1000千米的公路，第一周完成了全长的(1/7)，第二周和第三周各完成了全长的(2/5)，还剩下全长的几分之几没修？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (1/7) - (2/5) - (2/5)</gadget>
<output>2/35 = around 0.057143</output>

<result>2/35 = around 0.057143</result>