A steel pipe is cut off by (3/4) and then cut off by (3/4) meters, just after cutting off, what is the original length of the steel pipe?
一根钢管截去它的(3/4)又截去(3/4)米，刚好截完，原来钢管长多少米．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

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

<result>3</result>