345 has no special meaning in numbers. It's just a numerical value consisting of numbers 3, 4 and 5. The existence and use of numbers is mainly to facilitate people to express and exchange digital information. In the digital system, each number represents a different digital meaning. To understand the meaning of numbers, we need to combine specific context and usage. Therefore, 345 may represent different digital meanings in different situations.

The application of numbers has penetrated into all fields of human society. From the earliest abacus and slide rule to modern digital products such as computers and smart phones, the development of digital technology has a profound impact on people's production and lifestyle. The concept and technology of digitalization are constantly applied and popularized by workers from all walks of life. For example, the application of digitalization in medical care, finance, education and other fields has become a symbolic tool and means to pursue high efficiency, convenience and accuracy.

Numbers are frequently used in our daily life, but there are also risks of improper use or abuse. For example, in the field of network security, some hackers constantly infringe on the rights and interests of network users through digital malicious attacks, phishing and other means. In addition, with the emergence of new technologies such as artificial intelligence, big data and Internet of Things, the issue of personal information and privacy protection has attracted more and more attention. Therefore, we need to manage and apply figures in a fair, scientific and standardized way to avoid the adverse effects and possible risks brought by figures.