
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
In a certain national demonstration high school, there are $x$ students in the first year of high school, $900$ students in the second year, and $y$ students in the third year. A stratified sampling of $370$ people is conducted, with $120$ people drawn from the first year and $100$ people drawn from the third year. Calculate the total number of students in the high school department of the whole school.

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