Read 2 Chronicles 3:3 Using Other Translations
Now these are the things wherein Solomon was instructed for the building of the house of God. The length by cubits after the first measure was threescore cubits, and the breadth twenty cubits.
These are Solomon's measurements for building the house of God: the length, in cubits of the old standard, was sixty cubits, and the breadth twenty cubits.
These are the dimensions Solomon used for the foundation of the Temple of God (using the old standard of measurement). It was 90 feet long and 30 feet wide.