Hi, I have 120" exactly for my L kitchen,

I was planning on a 47" corner cabinet, then on the long L a 12", a disdhwasher, a sink cabinet and a 24" cabinet.

That turns out to be 122" on the planner.

I am not fully understand how the corner cabinet measure 26". I have measured what that looks like in the current set up and that seem really deep, I dont quite get it.

is it rounded up? why would most cabinets be 24" depth but then this is one is 26"?