Separating info into seperate fields

[Ben Ball]

I have multiple records That I have imported via a CSV file. I need to seperate the info of one field which is not consistent.

for example

1 record has (field a) with a value of 12 x 120mm

2nd record has (field a) with a value of 1 1/2 X 2"

i need (field b ) as a calculation to extrapolate the first part before the X i.e 12 and 1 1/2 respectively and field c to calculate the last part 120mm and 2" respectively .. 

How can I calculate this?

TIA

 

 

 

 

 

 

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