Hi. There's something wrong with me I think. No matter how much I research dosage conversions on the Internet, I just can't figure out how much to use of the product I have, along with what my syringe says! Can someone perhaps help?

I bought Deca and it came on 5 ml pouches. My syringe full mark says 3 ml/cc
I want to do 300 mg to 400 mg max. per week.

So.... 1) How much of the 5 ml pouch will I load into the syringe? 2) How much (in ml/cc) do I load into the syringe for it to be 300 mg? I've read much on how to convert, but I still need help please. Thank You