# *= Operator (C# Reference)

The binary multiplication assignment operator.

## Remarks

An expression using the *= assignment operator, such as

```
x *= y
```

is equivalent to

```
x = x * y
```

except that x is only evaluated once. The * operator is predefined for numeric types to perform multiplication.

The *= operator cannot be overloaded directly, but user-defined types can overload the * operator (see operator).

## Example

```
class MainClass10
{
static void Main()
{
int a = 5;
a *= 6;
Console.WriteLine(a);
}
}
/*
Output:
30
*/
```