What is the full score of IELTS?

Hello, IELTS score is 9, and the average score of each part is 4:

1) spoken English, out of 9, with 0.5 as decimal.

2) Listening, out of 9, with 0.5 as the decimal system.

3) Reading comprehension, out of 9, 0.5 after the decimal point.

4) Writing, out of 9, with 0.5 as the decimal system.

Then the four assessments are averaged again, and 0.5 is taken as the rounding system, that is, 5.27 is promoted to 5.5 and 5.24 is reduced to 5. The highest average score is 9 out of 100 100.