Here's my formula:

```
int a;
int b;
int c;

double multiplier;

amount = Convert.ToInt32(Math.Round(multiplier * a * (4 * b + c) / 100, 0));

```

When I get a value that would make it have a decimal of .5 or greater it's rounding down instead. How do I make it so that this equation will round off the final result (and I know how to display as a string)?