
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
On August 16, 2022, the airlock chamber of the Tianwen Experimental Module, the main exit channel for astronauts, made its first appearance. In order to understand the students' level of interest in this news, a certain high school used stratified sampling to select 36 students from three grades. Among them, 15 students were selected from the first grade, 12 students from the second grade, and there are a total of 900 students in the third grade. The total number of students in this high school is ______.

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