The school bought a bundle of wires, used 40% of the total length for the first time, used 45% of the total length the next day, and shared 85 meters for the two times. How many meters is this bundle of wires in total?
学校买了一捆电线，第一次用去了全长的40%，第二天用去了全长的45%，两次共用去85米，这捆电线共长多少米？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">(2/5) + (9/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">85 / (17/20)</gadget>
<output>100</output>

<result>100</result>