It is an improved version of the calculator I built earlier
It adds
Anything + 0, 0 + anything, 1+1, 2+2, 3+3,4+4,1+3,1+2,2+1,3+1,4+1,3+4,4+5,4+3,,1+9,2+9 and so on.
Few additions are not correct due to space.
Figure them out
Hit each trains on the right to add any digit
It might take some seconds for the logics to be processed correctly .
