To make this easier on us, we can solve this inequality.
18/3=6
N is less than or equal to 6. So any number less than 6 would work.
Although there’s infinite values that could make this true, I will list only 3.
6,0,-6
Since it can be equal to, 6 would work. For 0 and -6, they’re both less than 6 so they would work.