I have a table where I have columns for Distance in Miles, Distance in Yards,
Release Time and Time Taken (in hours and minutes).
I also have a form with the same (plus other) data linked to the table.

When the Distance (eg. 10miles) and Time Taken (eg. 1hr 30mins) are entered
on the form, I want the distance in yards to be calculated and the speed in
Yds/min calculated and both entered in the respective cells in the table.

Question - what formulae do I use and exactly where do I insert the code.