
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
Mr. Li used a batch of fertilizer for his contracted wheat field. If he applies 6 kilograms per mu (a Chinese unit of area), he will need 300 kilograms more fertilizer; if he applies 5 kilograms per mu, he will have 200 kilograms of fertilizer left. How many mu is the wheat field Mr. Li contracted, and how many kilograms of fertilizer does he have?

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