There is a rope 30.5 meters long, if it forms a rectangle with a length of 2.4 meters and a width of 3.2 meters, how many meters are left on the rope?
有一条长30.5米的绳子，如果围成一个长2.4米，宽3.2米的长方形，这条绳子还剩多少米？
<result>19.2</result>