The road repair team repaired a 40-kilometer road. The full length (3/8) was repaired in the first week, and the full length (1/2) was repaired in the second week. How many kilometers are left to be repaired?
修路队修一条40千米的公路，第一周修了全长的(3/8)，第二周修了全长的(1/2)，还剩多少千米没有修？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (3/8) - (1/2)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">40 * (1/8)</gadget>
<output>5</output>

<result>5</result>