A piece of iron wire is 2m long, and (1/3) is used up, what fraction of the iron wire is left?
一根铁丝长2m，用去了(1/3)，这根铁丝还剩几分之几？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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