There is a sliding elevator in a shopping mall. It takes (1/2) minutes to go from the first floor to the second floor. It takes (2/3) minutes for Xiao Ming to walk from the first floor to the second floor. Xiao Ming walks from the first floor to the second floor on the running sliding elevator. How many minutes will it take.
某商场有一滑动电梯，从一楼到二楼需要(1/2)分钟，小明从一楼步行到二楼要(2/3)分钟，小明在运行的滑动电梯上从一楼走到二楼需要多少分钟．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / (1/2)</gadget>
<output>2</output>

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

<gadget id="calculator">1 / (2/3)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">2 + (3/2)</gadget>
<output>7/2 = around 3.5</output>

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

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