The length of a wire is equal to (1/3) plus (1/3) meters of itself, how many meters is this wire long?
一根铁丝的长度等于他本身的(1/3)加上(1/3)米，这根铁丝长多少米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

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