A piece of (2/3) long wood is sawed into 4 sections on average, and one section is used, and ((())/(())) meters are used, what is the total length of the wood left.
将一根(2/3)长的木料平均锯成4段，用去其中的一段，用去((())/(()))米，还剩下这根木料总长的多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>