Specific heat capacity

A 0.30 kg block of metal at 90 °C is placed in 0.50 kg of water at 20 °C in an insulated container. The specific heat capacity of the metal is $400\,\text{J/(kg °C)}$ and of water is $4200\,\text{J/(kg °C)}$. Assuming no heat loss, what is the final temperature of the water–metal system?