It has to do with something like the idea shown in this meme

I think it was actually a genuinely hard problem like an F or so. Does anyone remember? My Google-fu is failing me.
Looking for: Meme problem on CF. You "illegally cancel digits" in a fraction, which magically works.
It has to do with something like the idea shown in this meme

I think it was actually a genuinely hard problem like an F or so. Does anyone remember? My Google-fu is failing me.
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1194G - Another Meme Problem
Thank you! You are a wonderful soul
Here is the problem: 1567C - Carrying Conundrum
Now we need a problem about this and it should be perfect