<image>【Question】As shown in the figure, a pharmacy has an inaccurate balance scale (its two arms are not equal in length) and a 10-gram weight. A patient wants to buy 20 grams of traditional Chinese medicine. The clerk first places the weight on the left pan and the medicine on the right pan, and hands over the balanced medicine to the patient; then places the weight on the right pan and the medicine on the left pan, and hands over the balanced medicine to the patient again. Assuming the actual amount of medicine the patient buys at one time is m (grams), then m____________20 grams. (Please choose to fill in ">", "=" or "<")