A mathematical formula is a concise way to express a relationship between different quantities or variables using symbols and numbers. It often includes mathematical operations such as addition, subtraction, multiplication, and division. Formulas are used in various fields, including physics, engineering, and economics, to solve problems and make predictions. For example, the formula for the area of a rectangle is A = l × w, where A represents the area, l is the length, and w is the width. This formula allows us to calculate the space inside the rectangle by simply multiplying its length by its width.