
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 graduate student drove her sedan $150$ miles to a conference and averaged $25$ miles per gallon. For the return trip, she drove a rented van and covered a distance of $180$ miles, averaging only $15$ miles per gallon. Calculate the average gas mileage, in miles per gallon, for the entire round trip.

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