How much oil needs to be burned to obtain the amount of heat equal to 35.5 * 10 ^ 7 J?

Given:
Q = 35.5 * 10 ^ 7 Joules – the amount of heat that must be obtained;
q = 41 * 10 ^ 6 Joule / kilogram – specific heat of combustion of oil.
It is required to determine how much oil m (kilogram) needs to be burned to obtain heat equal to Q.
To determine the amount of oil, you need to use the following formula:
m = Q / q = 35.5 * 10 ^ 7 / (41 * 10 ^ 6) = 355 * 10 ^ 6 / (41 * 10 ^ 6) = 8.66 * 10 ^ 6/10 ^ 6 = 8, 66 kilograms.
Answer: to obtain the specified amount of heat, it is necessary to burn 8.66 kilograms of oil.