There are two strips of paper, one is 1.58 meters long and the other is 1.65 meters long. If the two strips are connected, the total length is 3.1 meters. How many meters is used for the paste part.
有两根纸条，一张长1.58米，另一张长1.65米，把两张纸条连接起来，总长是3.1米．粘贴部分用去多少米．
<gadget id="calculator">1.65 - 3.1</gadget>
<output>-1.45</output>

<gadget id="calculator">1.58 + (-1.45)</gadget>
<output>0.13</output>

<gadget id="calculator">0.13 / 2</gadget>
<output>0.065</output>

<result>0.065</result>