human
There are 18 green leaves on each of the 3 tea leaf plants. One-third of them turn yellow and fall off on each of the tea leaf plants. How many green leaves are left on the tea leaf plants?
assistant
How many green leaves are on the 3 tea leaf plants? ** In total, the 3 tea leaf plants have 18 x 3 = <<18*3=54>>54 green leaves.
How many yellow leaves are falling off of all plants? ** One-third of the yellow leaves falling off of all plants is 54 / 3 = <<54/3=18>>18.
How many green leaves are left on the plants? ** The number of remaining green leaves on the plants is 54 - 18 = <<54-18=36>>36.
#### 36