Is it ok to use single gang extensions in a multi-gang power extension, literally to add cable length NOT add extra appliances?

I know putting extensions in extensions is bad if you are trying to power too many things, but is it safe to literally use a single gang extension just to, essentially, extend the length of the power cable for a particular appliance?

submitted by /u/morthawt
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from DIY https://ift.tt/2Dz6i3X