M Int Div Floor (a // b)

Integer division is the unglamorous workhorse of ComfyUI math, and M Int Div Floor is the honest version of it. a divided by b (defaults 0 and 1), with the result rounded down to a whole number - Python's floor division, a // b - returned as a_div_b_floor. No floats, no rounding surprises; if you need "how many times does this fit into that" as an integer, this is the node.

The real-world uses are the tile and grid ones:

• Aspect-ratio scaling. Need a height that keeps a 16:9 ratio but lands on an integer? Width divided by a fixed ratio constant gives you the base, then a multiply-and-clamp chain finishes the job.
• Tiling. "How many 512 tiles fit along a 2000px image?" - a_div_b_floor answers exactly that, and the remainder is what the pack's M Int DivMod node hands you alongside it.
• Batch/loop math. Splitting a count into groups of N needs integer division, and floor semantics (not truncation toward zero) matter when negatives are in play - floor division handles those the way you'd expect from school math, not the way a C programmer would expect.

One behavior to know before it bites you: divide by zero doesn't crash - the node returns 0 instead. That's a deliberate safety choice in the code, and it's friendlier than an exception mid-run, but it's also silently wrong if you ever wire a zero divisor in by mistake. If that matters to your workflow, guard the divisor upstream.

Inputs a and b are plain INT sockets (signed 32-bit), output is a single INT. It composes with the pack's mul/add nodes for multi-step calculations.

It ships in ComfyUiNodes (repo Madlumi/ComfyUiNodes, author "Madanie"), a small pack of integer math, string, and workflow-glue nodes. Install via ComfyUI Manager - search "ComfyUiNodes" - or:

cd ComfyUI/custom_nodes
git clone https://github.com/Madlumi/ComfyUiNodes

Then restart ComfyUI. No pip requirements or model downloads. Find it under Add Node → mnodes → int.

If the "safe zero" behavior bugs you, that's fair - but for tiling and aspect math, this node is the cleanest way to keep everything in integers.