Free Coffee Cups

For each of the 6 coffee cups I buy, I get a 7th cup free. In total, I get 7 cups. Create a function that takes n cups bought and return the total number of cups I would get.

Examples

total_cups(6) ➞ 7

total_cups(12) ➞ 14

total_cups(213) ➞ 248

Notes

• Number of cups I bought + number of cups I got for free.
• Only valid inputs will be given.