The mass flow rate of the juice product (specific heat = 3.8kJ/(kg C)) during pasteurization in an indirect heat exchanger utilizing hot water as the heating medium is 1000 kg/h, which enters the heating system at 30 C. The hot water enters the system at 98 C and exits at 90 C, with a mass flow rate of 6000 kg/h (specific heat = 4.16 kJ/ (kg C)). Please determine the juice product's current temperature.