英文～请帮忙翻译一下～～

Hello, my GPA standard of 3.1 algorithm using a common method of 2.3, what should I do with the kind of algorithm?

For example, students in a five-course credits and the results are as follows:
A four course credits, the results 92 (A);
B of the three credit course, the results 80 (B);
C course of the two credits, the results 98 (A);
D course of the six credits, the results 70 (C);
E courses of three credits, the results 89 (B).

GPA for more than five results:

Key algorithm standard GPA = (92 * 4 +80 * 3 +98 * 2 +70 * 6 +89 * 3) * 4〕 / Key (4 +3 +2 +6 +3) * 100 = 3.31〕

Common algorithm GPA = (4 * 4 +3 * 3 +2 * 4 +6 * 2 +3 * 3) / (4 +3 +2 +6 +3) = 3.00