module BigMath

#=> "0.14142135623730950488016887242096975E1"
BigMath::sqrt(BigDecimal.new('2'), 16).to_s

precision, +numeric+.
Computes the square root of +decimal+ to the specified number of digits of

sqrt(decimal, numeric) -> BigDecimal
call-seq:

def sqrt(x, prec)
  x.sqrt(prec)
end