Trigonometry Working

I am revising over trigonometry and I can't remember what the next line off working is in my calculator and what I write down in my jotter.

* Information -
Right Angled Triangle.
Angle = 64.
Adjacent = 5cm.
Opposite = x cm.

* Working so far -
SOH CAH TOA - Tan.

Tan64= O/A = x/5.


What do I do next?

from
Tan64= O/A = x/5

x = 5 tan 64 = 10.3cm