human
Jeremy saw 12 birds in their backyard and threw a stone at them, scaring away 1/3 of that number. A few minutes later, 20 more birds joined the fearless birds. How many birds are now in the backyard?
assistant
How many birds were scared away after Jeremy threw the stone at them? ** The total number of birds scared away after he threw the stone at them is 1/3 * 12 = <<1/3*12=4>>4 birds.
How many birds were left after Jeremy threw the stone at them? ** The total number of birds remaining is 12 - 4 = <<12-4=8>>8 birds.
How many birds are now in the backyard? ** If 20 more birds joined, the total number of birds in the backyard will become 8 + 20 = <<8+20=28>>28 birds.
#### 28