
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
Given vectors $\overrightarrow{AB}$ and $\overrightarrow{AC}$ form an angle of $120^{\circ}$, and $|\overrightarrow{AB}|=2$, $|\overrightarrow{AC}|=3$. If $\overrightarrow{AP}=\lambda \overrightarrow{AB}+\overrightarrow{AC}$ and $\overrightarrow{AP}\bot \overrightarrow{BC}$, then the value of the real number $\lambda$ is ______.

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