Project 2: Instagram user analytics

Your Task: Calculate the average number of posts per user on Instagram. Also, provide the total number of photos on Instagram divided by the total number of users. This is the task of user engagement under investor metrics. My doubt is aren't the two questions same? As per I know, the average number of posts per user is defined by the total number of posts/Total number of users. What do you mean by posts here? Aren't they refering to photos?