$\"\"$

Identity multiplication.

The equation was multiplied by $\"\"$ and remained the same.

Multiplicative identity property: $\"\"$ .

For example: Division has an identity, then $\"\"$ and $\"\"$ .

Therefore, the number $\"\"$ is the multiplication and division are gave remained the same. \ \

$\"\"$

The number $\"\"$ is the multiplication and division property are saisified and same the remaineder. \ \