
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 order to understand the academic level of students in a certain high school, the education department conducted stratified sampling by grade, selecting 100 students from a total of 2400 students in the school. If there are 840 students in the first grade of the school, then the number of first-grade students that should be selected is ______.

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