An interactive look at how rows, columns and dot products build a matrix product.
New here? Three ways to explore:
Hover any cell — the matching row/column lights up across A, B and C.
Click a row of A, a column of B, or a cell of C — the panel below expands the row / column / dot-product breakdown.
Drag down a column of C (or across a row) — same breakdown, triggered from the result side. C's column = a linear combination of A's columns.
On mobile (or as a quick desktop shortcut): tap a C cell for the dot product, then tap a second C cell in the same column for the column picture (or in the same row for the row picture).
Edit Mode — switch it on, then click any A or B cell and type a value; the result C updates live as you type.