###Human: Gordon owns 3 restaurants, his first restaurant serves 20 meals, his second restaurant serves 40 meals, and his third restaurant serves 50 meals per day. How many meals do his 3 restaurants serve per week?, ### Assistant: Gordon serves 20 x 7 = 140 meals in his first restaurant per week.
He serves 40 x 7= 280 meals in his second restaurant per week.
At the third restaurant, he serves 50 x 7 = 350 meals per week.
Therefore, he serves 140 + 280 + 350 = 770 meals in total per week. 
 So the answer is :  770