
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
In recent years, the competition in the communication market has been fierce. A telecommunications company reduced its call charges by $a$ yuan per minute according to the original standard, and then reduced it by another 20%. The current charge standard is $b$ yuan per minute. The original charge standard was per minute.

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