How to calculate a division

When I write the code you gave me it does not work. When I write 'this.getField' instead of +getField it works. Why?

Assuming you're working with a form, you'll have to use JavaScript. Here's a sample custom calculate script for a text field:

// Custom calculate script

// Get the field values, as numbers

var numerator = +getField("text1").value;

var denominator = +getField("text2").value;

// Calculate and set this field value

if (denominator !== 0) {

    event.value = numerator / denominator;

} else {

    event.value = "";

}

You'd have to replace "text1" and "text2" with the actual field names, and perhaps modify this script if you're doing something other than dividing one field value by another.

Also, that last if/else block can be reduced to just the following"

// Calculate and set this field value

event.value = denominator !== 0 ? numerator / denominator : "";