On the Nav Computer: Centre dot on TAS 480kts, put the heading, 233šT, under the HEADING index. With heading 233šT and track 240šT the drift is 7š Stbd (right). Mark the wind vector where the drift (7šStbd) crosses the groundspeed (523kts). Rotate to put this mark under the centre dot and read the wind: 110šT/75kts

These questions can occasionally be contentious and accuracy is the name of the game.
Use a SUPER FINE NON PERMANENT marker pen with a small dot and make sure the Wind Side is clean.