How to register counters gas, water or electricity manually?

hello
Seeking to interpret the value of my water meter, gas and electricity manually. through a set interface.

What I need is that when I send such gas: gas 123 days and 2: 125, emoncms tell me I have spent 1 every day. and I represent on a daily chart.
and the same for electricity and water.

Is there any way to do that? Thank You!