Decimals for data type number

Hi Experts,

I am getting z filed  data type - Dec, Length - 8, Decimal Places - 5 from source.

For that i have created Keyfigure using the data type of  Number, Dec. which is allowing only 3 decimal places.

i need  5 decimal places for the keyfigure.

Guide me how can i get the 5 decimal places.

Thanks,

Nag