I need to process to parse a text string in column A to extract 2
values and return their product in colunmn B
A B
120x150 18000

It gets worse when sometimes in the same Col. A I get 2 sets of 2
values like in the following case
40x40x120x120 16000

First I have to test whether I have to deal with the first or second
case
but then I get lost in handling the Instr and InstrRev functions to
extract each set of values
Help appreciated