A piece of wood, the master uses (1/3) to make a table, and (1/6) to make a stool. Has this piece of wood been used up, and if not, what fraction of it is left?
一根木料，师傅做桌子用去(1/3)，做凳子用去它的(1/6)．这根木料有没有用完，如果没用完，还剩下它的几分之几？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/3) + (1/6)</gadget>
<output>1/2 = around 0.5</output>

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

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