Suppose that the microwave radiation has a wavelength of 12.4 cm. How many photons are required to heat 265 ml of coffee from 25.0 degrees C to 62.0

Suppose that the microwave radiation has a wavelength of 12.4 cm. How many photons are required to heat 265 ml of coffee from 25.0 degrees C to 62.0 degrees C ? Assume that the coffee has the same density, 0.997 g/ml, and specific heat capacity, 4.184J/(g*K), as water over this temperature range.