The way to find this out is you want to take the number of seeds and divide it by the amount he would like in the pack. You want to see how many 12s can fit into 360. 360/12 if you divide 360 by 12, you will come to your total and final answer of 30 :)
Use the law of sines; see the attached picture.
Just do 28 times 3 and you will get 84 to check this just divide 84 to 28.....
