Is the Brain Computable?

Here is a question for all people thinking about brain is a information processing system.

If I give you the so called algorithm that the brain is running to process the info. Where the input is state of the sensory neurons/axions/dendrites and current state of every other neurons/axions/dendrites and the output is the updated state of all the neurons/axions/dendrites. Basically huge number of number go into the algorithm and huge number of numbers come out of the algorithm. How in the world you can tell what the brain just thought about or saw or said or imagined using those numbers?