1 Engage the number lock.
2 Place the cursor.
3. Hold down [Alt] and simultaneously type 0178 on the keypad.
(Must be done on the keypad not the numbers across the top of the keyboard.)
4. Release [Alt]
5. Disengage number lock.
Or you can just use ^, which stands for exponent. 2^2 = 2 exponent 2 = 2² .