It took (6/7) minutes for Li Ming to go up from the third floor to the fifth floor. At the same speed, how long would it take him to go up from the first floor to the sixth floor?
李明从三楼上到五楼用了(6/7)分钟，照同样的速度，他从一楼上到六楼需要多长时间？
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">(6/7) / 2</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">(3/7) * 5</gadget>
<output>15/7 = around 2.142857</output>

<result>15/7 = around 2.142857</result>