Question: What does "%." mean in Maple?

This is a follow-up to a previous question I asked that was answered with code that used "%.". From the documentation I can see that % is a nullary operator that gives us the value of "the last expression", which I think means the last result of an evaluated expression.

In my previous question, I wanted to be able to display for example, a constant times a matrix, without the product being evaluated.

For example, given A:=<1,2;3,4>:, we need to use Maple Input, and then we can write c__1.A and the output will be an expression that has c__1 then the dot product symbol and then the matrix A written out.

My question is simply: what exactly is "%."?

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