You can't convert "30x" to milligrams directly because "x" is a variable, meaning it could represent any number.

To figure out how many milligrams 30x equals, you need to know the value of x.

For example:

* If x = 1, then 30x = 30 milligrams

* If x = 5, then 30x = 150 milligrams

* If x = 0.5, then 30x = 15 milligrams

Let me know the value of x, and I can tell you how many milligrams it equals!