Multiplying Polynomials Word Problems - Examples & Practice

Danny has a circular pool, but she thinks it is too small. She recently earned some money and decided to expand the size of the pool. Originally the pool had a circumference of $\pi x + 3 \pi$. She increased the radius of the pool by a factor of $\pi x + \pi$. What is the new circumference of the pool? (Hint: You don't need to know the circumference formula to solve this.)