Question

$823 at 9.23% for 4 years

Answer 1

Since your question is non-specific here are two sensible cases:

$823 at 9.23% ANNUAL COMPOUND interest after 4 years:

$823 (1.0923)^4 = $1171.57

$823 at 9.23% defined as interest over a period of four years (4-year-interest):

$823 * 1.0923 = $898.96