NEED guidence

I need guidance how to create a function tat does the down below as it is very urgent. As i have no idea on how to do this :/

extracts the second and third digit from a number,performs a calculation that returns the remainder by dividing the extracted two digit number by 17 and Add 1 to the remainder value.
What have you tried, can you show us your code so far?

Hint: you can use the modulus operator to extract units, tens and hundreds from your number.
@hk1996, need you count from the most significant digit or from the least significant?
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