Write a function to convert the image attached on the top of this page to grayscale.

Sure, here's a code snippet in Python to convert an image to grayscale:

from PIL import Image

def convert_to_grayscale(image_path):
    # Open the image
    image = Image.open(image_path)
    
    # Convert to grayscale
    grayscale_image = image.convert('L')
    
    # Save the grayscale image
    grayscale_image.save('grayscale_' + image_path)

You can call this function with the path to your image file as the argument. This will convert the image to grayscale and save the result as a new image file with "grayscale_" prefix.