A 74.7-kg patient undergoes a diagnostic chest x-ray and receives a biologically equivalent dose of 0.200 mSv distributed over 33% of the patient's body mass. If the x-rays have a relative biological effectiveness of 0.840, how much energy is absorbed by the patient's body?

my answer was 5.87 mJ but it was marked incorrect.I'm looking for other ways to solve this to get closer to the correct answer of 5.93 mJ