0.5625 or 14/25 is your answer.
I got this by finding 3/4 or 0.75 of 3/4 (0.75). I converted the fractions to decimals and found the answer to the equation 0.75 X 0.75. The answer was 0.5625 and therefore the answer to your question is 0.5625.
Hope this helps, if not, comment below please!!!