
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
A certain unit has $840$ employees. A systematic sample of $42$ people is taken for a questionnaire survey. The $840$ people are randomly numbered from $1$ to $840$. The number of people in the selected $42$ whose numbers fall within the interval $[61, 140]$ is _____.

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