How many kg of water taken at the boiling point can be turned into steam if you spend

How many kg of water taken at the boiling point can be turned into steam if you spend all the heat released during the complete combustion of 40 g of kerosene.

To find the desired mass of evaporated water, we use the equality: L * mw = qk * mk, whence we express: mw = qk * mk / L.
Values of constants and variables: qk – specific heat of combustion of kerosene (qk = 4.6 * 10 ^ 7 J / kg); mk is the mass of burnt kerosene (mk = 40 g = 0.04 kg); L is the specific heat of vaporization of water (L = 2.3 * 10 ^ 6 J / kg).
Calculation: mw = qk * mk / L = 4.6 * 10 ^ 7 * 0.04 / (2.3 * 10 ^ 6) = 0.8 kg.
Answer: You can turn 0.8 kg of water into steam.