<human>:  Bugs are thriving in a garden of 30 plants. The bugs are very hungry today and completely ate 20 plants. The next day, they were still full and only ate half of the remaining plants. After that, they ate only 1 of the plants that were left. How many plants remain?
<bot>: How many plants are left? ** The bugs ate enough plants for there to be 30-20=<<30-20=10>>10 left.
How many plants are left? ** They were still full and only ate half, leaving 10/2=<<10/2=5>>5 plants left.
How many plants are left? ** Later on, the bugs only ate 1 more which left 5-1=<<5-1=4>>4 plants in the garden.
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