It is impossible to calculate the multiple just by looking at it, because we don't know the focal length of the wide-angle end, and how close it is has nothing to do with the multiple. For example, Canon's 1200mm fixed-focus lens has a theoretical optical zoom of 1 times, but we can see the scenery several kilometers away.

Generally, the wide-angle end of small digital is 35mm (equivalent to 135), and the wide-angle end of wide-angle digital is about 28mm. Therefore, after five light changes, it is roughly equal to the focal length of 140- 175mm, and basically less than the distance of 100 m, and a full-length portrait of a person standing around 10 m can be taken.