Increase Evenly

I have 30 sts
&&On my next row I need to increase 4sts evenly

What would be the best way to go about this?

Since 30 isn’t equally divisible by 4 you fudge it. It doesn’t have to be perfect, they just don’t want you increasing all in one place. You can do it every 7 or so across the row. Here’s an increase calculator that you can play with, too.