One recipe says that potatoes should be peeled and cut into pieces, what does that mean? 3
Wall means removing the skin (it's easier than a blade) and quadrupling means cutting it into four parts.
Another answer is about a pair of nine-eyed wall-mounted twins. Peeling means removing the skin.
The wall means you throw away the skin.
In 4 pieces, you have to cut each package into 4 pieces.