Dilate the scale factor of 3

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

Write as a product: ac^2–ad+c^3–cd–bc^2+bd