Multiplying two input fields

I've been trying for ages to simply multiply two input fields - thought it would be simple (but not for me it seems)!

I've tried following two sets of instructions found on your site (below) and still not managed this.

1. add input field A (variable A)undefinedspan style="color: #000000; font-family: 'Arial',sans-serif; font-size: 12pt;">2. add input field B (variable B)undefinedspan style="color: #000000; font-family: 'Arial',sans-serif; font-size: 12pt;">3. add text field named “Result-Text”undefinedspan style="color: #000000; font-family: 'Arial',sans-serif; font-size: 12pt;">4. add variable named “Result”undefinedspan style="color: #000000; font-family: 'Arial',sans-serif; font-size: 12pt;">5. add button called “Plus” with two actions:undefinedspan style="color: #000000; font-family: 'Arial',sans-serif; font-size: 12pt;">5.1. set variable “Result” to VAR(A) + VAR(B)undefinedspan style="color: #000000; font-family: 'Arial',sans-serif; font-size: 12pt;">5.2. change content of “Result-Text” to variable “Result”undefinedspan style="color: #000000; font-family: 'Arial',sans-serif; font-size: 12pt;">6. repeat step 5 for subtraction, division, multiplication or any other math action

undefinedspan style="color: #000000; font-family: 'Arial',sans-serif; font-size: 16px;">1.undefined

On: Click

Action: Modify variable

Target: results

Type: Set equal to

Value: VAR(Entry_0001) (Insert the correct name of the variable associated with the first entry field)

2.undefined
On: Click
Action: Modify variable
Target: results
Type: Multiply Variable by
Value: VAR(Entry_0002)
3.undefinedspan style="color: #000000; font-family: 'Arial',sans-serif; font-size: 12pt;"undefined