Agricultural Drainage

The approximate relationship between total dissolved solids ($TDS$ in $\text{mg/L}$) and electrical conductivity ($EC$ in $\text{dS/m}$) for typical irrigation waters is $TDS \approx 640 \times EC$. If an irrigation water has $EC = 1.25\text{ dS/m}$, the estimated $TDS$ in $\text{mg/L}$ is ________ (answer in integer).