To build a road, the length of the repaired and unrepaired length is 4:5. If another 56 kilometers are repaired, the repaired length will account for 60% of the total length. How long is this railway in kilometers?
修一条路，已修的长度与未修的长度是4：5．如果再修56千米，已修的长度就占全长的60%．这条铁路全长多少千米？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(3/5) - (4/9)</gadget>
<output>7/45 = around 0.155556</output>

<gadget id="calculator">56 / (7/45)</gadget>
<output>360</output>

<result>360</result>