Wang Hao went to his grandmother's house by bicycle, and it took 6 minutes to go there, and the speed increased (1/11) when he returned, how many minutes less than when he went there.
王浩骑自行车去外婆家，去时用了6分钟，返回时速度加快了(1/11)，比去时少用多少分钟．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 11</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">1 + (1/11)</gadget>
<output>12/11 = around 1.090909</output>

<gadget id="calculator">(1/6) * (12/11)</gadget>
<output>2/11 = around 0.181818</output>

<gadget id="calculator">1 / (2/11)</gadget>
<output>11/2 = around 5.5</output>

<gadget id="calculator">6 - (11/2)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>