For a bundle of colored ribbons, the full length (1/4) is used for the first time, and 40% of the full length is used for the second time, and the first time is 9 meters less than the second time. How many meters is this bundle of ribbons?
一捆彩带，第一次用去全长的(1/4)，第二次用去全长的40%，第一次比第二次少用9米．这捆彩带共多少米？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">9 / (3/20)</gadget>
<output>60</output>

<result>60</result>