How do I create a multiplication calculation in Axure RP 9? Once the user enters the number of shirts they would like to buy, i would like the axure to multiply by $10 and display the total in the "order total" field.

3 Assignment21 - Axure RP 9 Team Edition: Unlicensed tulo Frem Sack 100 Sign In Selection Made Cat Group Urgus Preview PAGES DITIINE Town 200 100 OD 400 000 1000 700 3100 INTERACTIONS 1300 STIF 1300 NOTS (Group Namel Customer formation Shirt Details Team Information T-Shirt Details New Interaction The Price of each T-shirt is $10 Mouse Si Elles Short Sleeve Type: Color : White Small Size: Quantity: UBRARIES MASTERS Order Total: Default Latex Cheder MT 4 Tree TA Floral Clear Form Exit CM Next LO Shop Mat Arm Vertical AT 3 Assignment21 - Axure RP 9 Team Edition: Unlicensed tulo Frem Sack 100 Sign In Selection Made Cat Group Urgus Preview PAGES DITIINE Town 200 100 OD 400 000 1000 700 3100 INTERACTIONS 1300 STIF 1300 NOTS (Group Namel Customer formation Shirt Details Team Information T-Shirt Details New Interaction The Price of each T-shirt is $10 Mouse Si Elles Short Sleeve Type: Color : White Small Size: Quantity: UBRARIES MASTERS Order Total: Default Latex Cheder MT 4 Tree TA Floral Clear Form Exit CM Next LO Shop Mat Arm Vertical AT