One rope is 5.5 meters long and is 2.58 meters longer than the other. How long are the two ropes in meters?
一条绳子长5.5米，比另一条长2.58米．两条绳子一共长多少米？
<gadget id="calculator">5.5 - 2.58</gadget>
<output>2.92</output>

<gadget id="calculator">5.5 + 2.92</gadget>
<output>8.42</output>

<result>8.42</result>