Thank You PaulS.
Is it possible to round 6.935 to 6.9?
Another question:On the LCD shield there are some buttons. All connected through resistors to one analog input. There is need to program the quantity of expected pulses. As usual, press some seconds "Menu" button and get the value to be changed flashing, the with arrow buttons "Up" or "Down" change the value. Then "Enter" or wait some seconds.
Is somewhere an example?