title: Contact Form 7 adding custom calculation into notification email
body: <p>I embedded contact form 7 on my site. Basically what I want is, customer fills in my form (name, gross income, loan amount, loan term etc), then all form information goes to me and a response email back to customer with some calculations(e.g result1 = loan amount/loan term). How can I add result1 into the response email?</p>