
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
Define $[a,b,c]$ to mean $\frac {a+b}c$, where $c \neq 0$. Instead of calculating single entries, calculate the double entry defined as $[[a,b,c],[d,e,f]] = [a+b, d+e, c+f]$. What is the value of 

$\left[[[10,20,30],[40,30,70]],[[8,4,12],[18,9,27]]\right]?$
A) 0.05
B) 0.1
C) 0.142564
D) 0.2
E) 0.25

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