30×4

30x4 is a notation commonly used in various fields to indicate a specific size or dimension. In contexts such as printing, paper sizes, or manufacturing, it typically signifies a measurement of 30 units by 4 units. The units themselves can vary depending on the specific industry or application, and could represent inches, centimeters, millimeters, or other standard measures. For instance, in printing, 30x4 might refer to the dimensions of a poster or a specific type of card stock. In manufacturing, it could describe the size of a component or a piece of material. The order of the numbers generally indicates length and width or height, though context is crucial for precise interpretation. Without explicit units, the notation is inherently ambiguous, and understanding the application is key to deciphering the exact dimensions represented by 30x4. This format is a shorthand for communicating size specifications efficiently.