[Jprogramming] Extracting digits of Pi

[m l]

The verb <.@o.10x^n generates the n digits of Pi.
 
Now, asign this to a variable, for example, a=.<.@o.10x^200 (n=200 in this case)
 
How to extract the n/2 first digts and asign to another variable ? 
 
How to extract the n/2 last digits and asign to a variable ?
 
Thanks.                                           
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