One of the most important problem solving skills for math contests is figuring out how to make a problem easier to solve.

Find the sum of all positive factors of $72.$

Now, obviously, if there were more than 2 factors, we can't use a multiplication grid. However, we can use this same strategy to more dimensions.

What is the sum of the positive factors of $360 = 2^3 \cdot 3^2 \cdot 5?$

Reframing a problem is also used in Combinatorics.

How many ways are there to divide $5$ indistinguisable candies among $3$ distinguishable friends?

How many ways are there to divide $5$ indistinguisable candies among $3$ distinguishable friends such that each friend must receive atleast $1$ candy?