Related Clues:

• Height times width
• Word with code or rug
• Side squared, for squares
• Carpentry calculation
• Type of rug
• Code that's not a secret
• Floor space
• Piece of land
• L x W
• Surroundings
• Kew Gardens' 288
• Geometrician's calculation
• It has a code
• Realm
• Kind of code used every day