
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
Xiaogang is $1.7m$ tall. When standing in the sunlight, his shadow is measured to be $0.85m$. Then, he raises his arm vertically and the shadow is measured to be $1.1m$. Calculate the length by which Xiaogang's raised arm exceeds his head.

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