New Problem: Calculate Dot product of two vectors

[rittik9]

In mathematics, the dot product or scalar product[note 1] is an algebraic operation that takes two equal-length sequences of numbers (usually coordinate vectors), and returns a single number. In Euclidean geometry, the dot product of the Cartesian coordinates of two vectors is widely used.It is often called the inner product (or rarely the projection product) of Euclidean space.

Source: Wikipedia

[moe18]

that is a needed problem, it would help people build up their foundation