For a cable, the full length (1/3) was used for the first time, and the full length (4/15) was used for the second time. At this time, there were still 80 meters left. How long was the cable?
一根电缆线，第一次用了全长的(1/3)，第二次用了全长的(4/15)，这时还剩80米，这根电缆线原来有多长？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">1 - (1/3) - (4/15)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">80 / (2/5)</gadget>
<output>200</output>

<result>200</result>