There are two ribbons, the first one is 8.2 meters long, the first one is 0.2 meters shorter than the second one, how many meters are the total length of the two ribbons?
有两条绸带，第一条长8.2米，第一条比第二条的2倍少0.2米，两条绸带共长多少米？
<gadget id="calculator">8.2 + 0.2</gadget>
<output>8.4</output>

<gadget id="calculator">8.4 / 2</gadget>
<output>4.2</output>

<gadget id="calculator">8.2 + 4.2</gadget>
<output>12.4</output>

<result>12.4</result>