Calculating water supply above, use 3 decimal places decimal position in case the position has a value of 5 to position 3 and 1 if a value less than 5, fixed decimal position 3.
To calculate the rate of water above the 3 decimal points in the places where 4 equals 5 or more to adjust the three other first, and if it is less than five fixed places where 3 under. old
Calculation of water supply rate above to use decimal 3 position. If the decimal position 4 equals 5 to adjust the position 3 up 1 and if the less 5 constant decimal position 3 unchanged.