If we are going to perform multiplication operation, then we need to remember that multiplication means repeated addition.
For example, 5x4 (read five times four) is equal to 20. So, all we have to do is to recall that multiplication is telling us how many groups of five numbers to add together. In this case, four groups of five numbers are added together.
5x4 = 4 + 4 + 4 + 4 + 4 = 20
Or we can think in this way: 5 groups of four numbers are added together.
4x5 = 5+5+5+5 = 20
Your answer is: 5x4 = 20