This operation usually uses some special symbols, such as *, δ, etc. It does not represent multiplication or other known operations in the traditional sense. In the newly defined operation, parentheses appear, and the part in parentheses must be calculated according to the algorithm first. This kind of operation is not suitable for direct calculation until it is converted into regular four operations.
New operations are sometimes used as solving tools in mathematical problems, especially in the Olympic Games or other mathematical competitions. New operations can help simplify some types of problems or provide a new perspective to look at and solve problems. The key to deal with the new operation is to correctly understand the definition and rules of the new operation and calculate in strict accordance with these rules.