The total length of the two ropes is 15.2 meters. If the first rope increases its (1/3) while the second rope decreases it (1/5), the two ropes will be the same length, and the first rope has the original length How many decimeters?
两根绳子一共长15.2米，如果第一根绳子增加它的(1/3)，同时第二根绳子减少它的(1/5)，这两根绳子就一样长，第一根绳子原长多少分米？
<gadget id="calculator">32 / 15</gadget>
<output>32/15 = around 2.133333</output>

<gadget id="calculator">12.16 / (32/15)</gadget>
<output>5.7</output>

<gadget id="calculator">5.7 * 10</gadget>
<output>57</output>

<result>57</result>