In traditional Chinese medicine, quantity usually refers to the weight unit of traditional Chinese medicine, and gram is the international common weight unit. The conversion relationship between them can be expressed by the following mathematical formula: 1 quantity = 3g. This formula is about how to change the weight of traditional Chinese medicine from quantity to gram. Therefore, we only need to use this formula to find the answer. The calculation result is: 1 equals 3 grams. So 1 corresponds to 3 grams.