On the number line with a unit length of 1, how many unit lengths are the points representing the two numbers +1 and -5 apart?
在单位长度为1的数轴上，表示+1和-5这两个数的点相距多少个单位长度．
<gadget id="calculator">1 - (-5)</gadget>
<output>6</output>

<result>6</result>