Lattice multiplication : Lattice multiplication is an algorithm for multiplying two natural numbers in which one number is written on top of the grid and one number on the right side of a grid. The grid is then filled by multiplying the digit of the number above the grid space with the digit of the number on the right side of the grid space. Adding up diagonals in the grid then gives the digits of the result of the multiplication.

Multiplication : Multiplication is the mathematical operation that is a shorthand for adding the same amount several times. For example $3\cdot 4=4+4+4=12.$

Number : A number $x$ is a mathematical symbol representing a quantity.