
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
Bev is driving from Waterloo, ON to Marathon, ON. She has driven 312 km and has 858 km still to drive. Calculate the distance Bev must still drive in order to be halfway from Waterloo to Marathon.

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