Siebel's formula for the specific heat of agricultural food produce above freezing is $C_p = 0.837 + 0.0335 w$, where $w$ is the moisture content in percentage (wet basis) and $C_p$ is in $\text{kJ/(kg}\cdot\text{K)}$. For fresh fruits containing $85\%$ moisture content (w.b.), the specific heat $C_p$ in $\text{kJ/(kg}\cdot\text{K)}$ is ________ (round off to 3 decimal places).