A piece of iron wire is cut off (1/4) to cut off exactly 25 meters, what is the original length of the wire.
一根铁丝截去(1/4)正好截去25米，这根铁丝原长是多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">25 / (1/4)</gadget>
<output>100</output>

<result>100</result>