Question: $1000, 12% compound every 3 month

So if we divide 12/3 = 4%. This 4% is consider for single 3 month period, so my question is there are total 4 quarters of 3 months in a year, so if we add 4 + 4 + 4 + 4 = 16% which is above of the total interest of the year.

Sir said 12% in one year then how much % in 3 months so he divided 12/3 = 4 % for 3 month.

But logically for 12 months => 12%

3 months => ? So the answer might be (3 * 12) / 12 = 3% for three months.

How it is possible? Please correct my understanding