
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 implement the "Huitian Plan", the government is planning to build a sports and cultural park in each of the Huidongguan and Tiantongyuan areas. In order to understand the demand for sports facilities in the park, a certain community used a stratified sampling method to survey residents aged 21 to 65. It is known that there are 840 residents aged 21 to 35 in the community, 700 residents aged 36 to 50, and 560 residents aged 51 to 65. If 100 people are randomly selected from the 36 to 50 age group, the total number of people selected in this survey is $\_\_\_\_\_\_$.

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