A piece of iron wire is (8/9) m long, and (2/3) of it is used up, how much m is left?
一根铁丝长(8/9)m，用去了它的(2/3)，还剩多少m？
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">(8/9) * (1/3)</gadget>
<output>8/27 = around 0.296296</output>

<result>8/27 = around 0.296296</result>