Evaluate logarithms (advanced)

$\log_{\,16}{4}$log, start base, 16, end base, 4 =

• Your answer should be
• an integer, like $6$6
• a simplified proper fraction, like $3/5$3, slash, 5
• a simplified improper fraction, like $7/4$7, slash, 4
• a mixed number, like $1\ 3/4$1, space, 3, slash, 4
• an exact decimal, like $0.75$0, point, 75
• a multiple of pi, like $12\ \text{pi}$12, space, start text, p, i, end text or $2/3\ \text{pi}$2, slash, 3, space, start text, p, i, end text