
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
The bacteria in a jar triple every 30 seconds. After five minutes, there are 1,239,220 bacteria in the jar. However, halfway through the experiment, half of the bacteria were killed by an antibiotic. How many were in the jar at the beginning of the experiment?

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