Here is an ‘Contact Form 7’ example:

<p>Value 1<br />
[text 1="class:calcomatic" language="value1"][/text]</p>

<p>Value 2<br />
[text 1="class:calcomatic" language="value2"][/text] </p>

<p>Value 3<br />
[select value3 class:calcomatic include_blank "1" "2" "3" "4" "5"] </p>

<p>Value 4<br />
[select value4 class:calcomatic include_blank "1" "2" "3" "4" "5"] </p>

<p>Value 5<br />
[radio value5 class:calcomatic "1" "2" "3" "4" "5"]</p>

<p>Value 6<br />
[radio value6 class:calcomatic "1" "2" "3" "4" "5"]</p>

<p>Value 7<br />
[checkbox value7 class:calcomatic "1" "2" "3" "4" "5"]</p>

<p>Grand Total<br />
[text 1="id:calcsumatic" language="grand_total"][/text]</p>

<p>[submit "Send"]</p>

And a ‘Contact Form 7’ Demo.