The engineering team installed a pipeline, installed (4/5) km in the first week, (3/4) km in the second week, (5/8) km less than the sum of the previous two weeks in the third week, and the third How many km was installed in a week?
工程队安装一条管道，第一周安装了(4/5)km，第二周安装了(3/4)km，第三周比前两周安装的总和少(5/8)km，第三周安装了多少km？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(3/4) - (5/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(4/5) + (1/8)</gadget>
<output>37/40 = around 0.925</output>

<result>37/40 = around 0.925</result>