PROGRAMMING:Calculate the average score
This topic requires to read the score (integer) of 3 courses, calculate the average score and output, and reserve 2 decimal places.
###Input format:
Enter 3 integers.
###Output format:
Output the average of the three numbers, and keep 2 decimal places.
###Input example:
Here is a set of inputs. For example:
```in
eighty-nine
seventy
ninety-two
```
###Output example:
The corresponding output is given here. For example:
```out
avg = 83.67
```
answer：If there is no answer, please comment
###Input format:
Enter 3 integers.
###Output format:
Output the average of the three numbers, and keep 2 decimal places.
###Input example:
Here is a set of inputs. For example:
```in
eighty-nine
seventy
ninety-two
```
###Output example:
The corresponding output is given here. For example:
```out
avg = 83.67
```
answer：If there is no answer, please comment