Use a wire to connect two computers into a local area network. For the first time, half of it is used for more than 1 meter. For the second time, the remaining half is used for less than 1 meter. Finally, 3.7 meters are left. What is the total length of this wire? ?
用一根电线把两台电脑连成局域网，第一次用去它的一半多1米，第二次用去剩下的一半少1米，最后剩下3.7米，这根电线总长是多少米？
<gadget id="calculator">3.7 - 1</gadget>
<output>2.7</output>

<gadget id="calculator">2.7 * 2</gadget>
<output>5.4</output>

<gadget id="calculator">5.4 + 1</gadget>
<output>6.4</output>

<gadget id="calculator">6.4 * 2</gadget>
<output>12.8</output>

<result>12.8</result>