
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
Karl's car uses a gallon of gas every $40$ miles, and his gas tank holds $16$ gallons when it is full. One day, Karl started with a full tank of gas, drove $400$ miles, bought $10$ gallons of gas, and continued driving to his destination. When he arrived, his gas tank was half full. How many miles did Karl drive that day?
A) 650 miles
B) 720 miles
C) 760 miles
D) 800 miles

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