
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
To green the living environment, a city launched a tree-planting campaign. This year, the city has planted 64,000 trees and plans to plant 125,000 trees annually after 3 years. If the annual growth rate of the number of trees planted is $a$, then $a=$ ______.

Present the answer in LaTex format: \boxed{Your answer}
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