A piece of iron wire is (3/4) meters long, cut off (1/3), how much of it is left
一根铁丝长(3/4)米，截去(1/3)，还剩它的多少
<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>

<result>2/3 = around 0.666667</result>