To build a road, the full length (1/7) was built on the first day, (3/2) times the first day on the second day, (4/3) times the second day, and (4/3) times the second day. What fraction of the total length was repaired in three days?
修一条路，第一天修了全长的(1/7)，第二天修了第一天的(3/2)倍，第三天修的是第二天的(4/3)倍，第三天修了全长的几分之几？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(1/7) * (3/2) * (4/3)</gadget>
<output>2/7 = around 0.285714</output>

<result>2/7 = around 0.285714</result>