A conference center has six rooms. Each room can hold up to 80 people. Today, the conference center is only 2/3 full. How many people are in the conference center?
The conference center can hold up to 80 x 6 = <<80*6=480>>480 people.
Today, there are 480 x 2/3 = <<480*2/3=320>>320 people in the conference center.
#### 320