There is no such unit as pg. Perhaps you are getting confused with the abbreviation MPG, which stands for "miles per gallon", a unit of fuel economy.
I'm assuming pg stands for picogram in which case: 1g = 1x1012 pg so... 2.183g = 2.183x1012 pg or 2,183,000,000,000 pg
You can't convert that.
Convert 2500 ft into miles
You can't convert miles to square miles. Miles measure distance, while square miles measure area.
To convert square miles to square feet, multiply the number of miles by 27878400
Multiply miles per second by 31,556,926 to convert to miles per year.
To convert miles to kilometers, multiply by 1.61 (a kilometer is about 0.62 miles).
460 miles = 460 miles
It is not possible to convert a length unit to an area unit.
To convert inches to miles you divide inches by 63,360. So, 221,760 / 63,360 = 3.5 miles.
You can't. Square miles are a measure of area. Miles are a measure of length/distance. You cannot convert between the two.
To convert from square miles to sq kms, multiply by 2.59.