What does it mean if a photo has been enlarged by a factor of 100?

If a photo has been enlarged by a factor of 100, it means that each dimension of the image (height and width) has been increased to 100 times its original size. Consequently, the overall area of the photo has increased by a factor of 10,000 (100 x 100). This enlargement can result in a loss of image quality and detail, especially if the original resolution is not high enough to support such a significant increase in size.