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 finance, to solve problems and make calculations easier. 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 quickly find the area by simply multiplying the length and width of the rectangle, demonstrating how formulas simplify complex calculations.