A road construction team wants to build a (6/7) kilometer long cement road. On the first day, (1/3) kilometer was repaired, and (1/4) kilometer was repaired on the second day. How many kilometers are left? build?
一个修路队要修一条长(6/7)千米的水泥路，第一天修了(1/3)千米，第二天修了(1/4)千米，还剩下多少千米没修？
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

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

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(6/7) - (1/3) - (1/4)</gadget>
<output>23/84 = around 0.27381</output>

<result>23/84 = around 0.27381</result>