microsoft+access+courses+in+london - Calculation

Yes you can.

There are 2 ways.

Option1
place a field that already has a calculation in it (ie. a query field) on the form. The field will recalculate each time you change the appropriate fields and record.

Option 2.
Simply type the formula that you want into the CONTROL SOURCE property for the field. an example is

=[Field1] * [Field2] / 1600