EXCEL operation is not a problem

Sometimes you find that my unit Ge Mingming is why can not participate in computing the value of it

FIG: [ENTER] and

 

There will be a

Why is it 0

There are several possible emergence of this, some data such as text, or you import external data, etc.

Then how to solve it

The number of changes that I make changes to the format selected then appears right

This is the value you can find ah

 

 

So we have how to solve it

We see that there is a yellow prompt click on it 

 

 Then converted value on it