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```
(2*4.5+1)/2=5
(2*5.5+1)/2=6
```

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(2*int(4.5)+1)/2=4.5
(2*int(5.5)+1)/2=5.5

Select or download this
```
int(2*4.5+1)/2=5
int(2*5.5+1)/2=6
```