How to Solve Multiple of 3 C# project

Question

Problem:
You are an elementary school teacher and explaining multiplication to students. You are going to use multiplication by 3 as your example.
The program you are given takes N number as input. Write a program to output all numbers from 1 to N, replacing all numbers that Multiples of 3 by "*"

Sample Input
7

Sample Output
12*45*7

Q: Is it asking me to list the multiples of 3 from 1 to 7? Also, How the F*** can 7 turn into 12*45*7? They need to explain what they want.

Answer 1

OMG I am stupid. I was reading it as 12, *, 45, *, 7 not 1, 2, *, 4, 5, * 7. Been looking at this for a day now going WTF.

Answer 2

「ＨＡＰＰＹ ＴＯ ＨＥＬＰ」 😂😂😂 I'm getting frustrated by looking 12*45*7😤 Thanks for the question Eric Clifford