PROGRAMMING:cigarettes
###Task description
Tom has many cigarettes. We hypothesized that he has n cigarettes and smokes them
one by one keeping all the butts. Out of k > 1 butts he can roll a new cigarette.
Now，do you know how many cigarettes can Tom has?
###Input format:
First input is a single line,it's m and stands for there are m testdata.then there are m lines ,each line contains two integer numbers giving the values of n and k.
###Output format:
For each line of input, output one integer number on a separate line giving the maximum number of cigarettes that Peter can have.
Sample input:
Sample output:
###Input example:
```in
three
4 3
10 3
100 5
```
###Output example:
```out
five
fourteen
one hundred and twenty-four
```
answer：If there is no answer, please comment
Tom has many cigarettes. We hypothesized that he has n cigarettes and smokes them
one by one keeping all the butts. Out of k > 1 butts he can roll a new cigarette.
Now，do you know how many cigarettes can Tom has?
###Input format:
First input is a single line,it's m and stands for there are m testdata.then there are m lines ,each line contains two integer numbers giving the values of n and k.
###Output format:
For each line of input, output one integer number on a separate line giving the maximum number of cigarettes that Peter can have.
Sample input:
Sample output:
###Input example:
```in
three
4 3
10 3
100 5
```
###Output example:
```out
five
fourteen
one hundred and twenty-four
```
answer：If there is no answer, please comment