Calculate the Variance of this stock

Year 1: 23

Year 2: 44

Year 3: -10

Year 4: -24

Year 5: 52

Please tell me what I am doing wrong. I found the average of these numbers first, which is 17. I then subtracted 17 from each years point of return. I then squared all these numbers and took the average of them, which ended up being 880, however that is very incorrect and I know the answer is supposed to be .110000