The total divided by the number equals the average.

5.2 meters is the total, because it takes 5.2 meters to knit four Chinese knots, which means there are four Chinese knots here.

So 5.2 ÷4 = 1.3 (m)

A: On average, each Chinese knot uses 1.3m ribbon.

You said it cost 33.6 yuan, which means it costs 33.6 meters to buy a 5.2-meter ribbon. So this is the total.

Since you didn't say the quantity (how many people bought it), I don't know how many people. Maybe you are wondering how I know that the number is people, not the number of Chinese knots like the last question. From the question, I found that "a * * * cost 33.6 yuan. How much did it cost per person on average? " Regardless of the number of Chinese knots. One * * * just two units: money (yuan) and number of people.

In the end, you have to do 33.6 people, and then you can get the money spent by everyone.

If you don't understand, keep asking.