The road construction team wants to build a 24-kilometer-long highway. The first week (1/3) of the full length was repaired, and the second week (2/6) of the full length was repaired. How many kilometers are left to be repaired?
修路队要修一条24千米长的公路，第一个星期修了全长的(1/3)，第二个星期修了全长的(2/6)，还剩下多少千米没有修？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) + (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">24 * (1/3)</gadget>
<output>8</output>

<result>8</result>