A piece of iron wire, after cutting off the original (3/7) and then connecting it with 85 cm, the length is now shorter than the original (1/8), how many centimeters was the original length of the iron wire?
一根铁丝，剪下原来的(3/7)后，又接上85厘米，这时的长度比原来短(1/8)，这根铁丝原来长多少厘米？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 - (3/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 - (1/8) - (4/7)</gadget>
<output>17/56 = around 0.303571</output>

<gadget id="calculator">85 / (17/56)</gadget>
<output>280</output>

<result>280</result>