rope uses up its full length (1/3) for the first time, and uses up its full length (2/5) for the second time. At this time, the rope is still 16 meters long. How many meters was the original length of the rope?
一根绳子第一次用去全长的(1/3)，第二次用去全长的(2/5)，这时这根绳子还有16米，这根绳子原长是多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (1/3) - (2/5)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">16 / (4/15)</gadget>
<output>60</output>

<result>60</result>