PROGRAMMING:Teaching assistant
###Task description
Classmate x, who is in the third grade of primary school, was recently selected by the teacher as the class representative and teaching assistant. His task is to correct the homework for the whole class. The assignment is to add, subtract, multiply and divide within one thousand. Chen Kun has to mark all the students and give them marks. Can he finish this task?
###Input format:
```
The first line is a positive integer n, indicating that there are n students' homework to be corrected.
After the second line are n groups of data.
The data format of each group is as follows:
The previous behavior is a positive integer m, which means that the student has done a total of M problems.
The next M line is m expressions.
Each formula is in the form of a + B = C. A and B are all non negative integers, and the operations are limited to +, -, *, / only,
Division is calculated according to the rules of C language. The total score of each person is 100, which is evenly distributed to each question,
The result error or operator error or illegal (divisor 0) formula does not score.
```
###Output format:
Output a total of N lines, each line output the student and score, the results retain 2 decimal places.
###Input example:
```in
three
five
1+2=3
5*6=30
9-5=6
100+200=300
100/5=20
two
35$6=41
50/10=5
two
1-1=2
1/0=1
```
###Output example:
```out
eighty
fifty
zero
```
###Tips
answer：If there is no answer, please comment
Classmate x, who is in the third grade of primary school, was recently selected by the teacher as the class representative and teaching assistant. His task is to correct the homework for the whole class. The assignment is to add, subtract, multiply and divide within one thousand. Chen Kun has to mark all the students and give them marks. Can he finish this task?
###Input format:
```
The first line is a positive integer n, indicating that there are n students' homework to be corrected.
After the second line are n groups of data.
The data format of each group is as follows:
The previous behavior is a positive integer m, which means that the student has done a total of M problems.
The next M line is m expressions.
Each formula is in the form of a + B = C. A and B are all non negative integers, and the operations are limited to +, -, *, / only,
Division is calculated according to the rules of C language. The total score of each person is 100, which is evenly distributed to each question,
The result error or operator error or illegal (divisor 0) formula does not score.
```
###Output format:
Output a total of N lines, each line output the student and score, the results retain 2 decimal places.
###Input example:
```in
three
five
1+2=3
5*6=30
9-5=6
100+200=300
100/5=20
two
35$6=41
50/10=5
two
1-1=2
1/0=1
```
###Output example:
```out
eighty
fifty
zero
```
###Tips
answer：If there is no answer, please comment