Put a rope vertically into the water, the wet part is 1.4 meters, turn around and put the other end into the water, at this time, only half of the rope and 1.1 meters more are dry. How many meters is this rope?
把一根绳子垂直放入水中，浸湿部分是1.4米，掉过头来把另一头放入水中，这时这根绳子只有一半还多1.1米是干的．这根绳子长多少米？
<gadget id="calculator">1.4 * 2</gadget>
<output>2.8</output>

<gadget id="calculator">1.1 + 2.8</gadget>
<output>3.9</output>

<gadget id="calculator">3.9 * 2</gadget>
<output>7.8</output>

<result>7.8</result>