Percentage Calculation code not working

Hello,

I'm trying to create a field that will automatically calculate drug compliance on a clinical trial. The formula is:

(Total dispensed - returned) / (Days between visits x dose[# of pills])

Example:(200-120) / (31 x 3) = 80 / 93 = 0.86 x 100 = 86%

I've used the below code in Adobe Acrobat Pro DC:

event.value=(this.getField("Text45").value-this.getField("Text46").value)/(this.getField("Text60").valueXthis.getField("Text48").value)

It accepts it with out any script error flags but the formula isn't working- its not calculating at all. Where did I go wrong?

Christy