#### Introduction

- There are two ways to multiply matrices; either by a number, or by another matrix.
- Scalar Multiplication is the the first of these, multiplying a matrix by a number.
- To multiply a matrix by a number, you multiply each element by that number.

#### Mathematical Definition

#### Example

#### code (Python)

```
import numpy as np
a = [[3, 6, 2], [5, 1, 10]]
b = np.multiply(a, 4)
print(b) # prints: [[12 24 8] [20 4 40]]
```

#### Notes

- The resulting matrix of the multiplication is called a 'Scalar Multiple'.