From Xiao Ming's home to Teacher Wang's house, the distance between the two houses is 2 kilometers. When he walks away (1/3), how many kilometers are there from the midpoint of the two houses?
小明从家到王老师家，两家相距2千米，当他走了(1/3)，离两家的中点还有多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">2 * (1/6)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>