This is (or should be) a relatively straightforward whiz wheel calculation.

1. Centre dot over top of wind grid.

2. Set wind direction (320°) under Index.

3. Mark windspeed (30kt) below wind grid line.

4. Move wind scale down to centre dot over TAS (125kt).

5. Rotate disc so True HDG (355°) is under Index.

6. Establish drift as 10° Right/Starboard, so ADD this to the True HDG to get a True Track of 005° (your aircraft is being blown to the right, so your True HDG will be left of Track to compensate).

7. Read off the GS of 102kt.