There are many ways - it depends what buttons you have on your calculator.
If you have button “sqrt” - just use it :)
If you have buttons exp and ln tyope the number then ln multiply by 0.5 and then press exp
If you have just basic multiplication - use bisection to get to the results.
For example, you want to calculate sqrt of 10 - try middle point between 0 and 10 - it’s 5, 5*5 = 25 - oops too much, so let’s try middle point between 0 and 5, i.e.
2.5, 2.5*2.5=6.25, not enough, so now try middle between 2.5 and 5, i.e. 3.75:
3.75*3.75 = 14 - too much, so let’s take middle of 2.5 and 3.75, i.e. 3.125
3.125*3.125 = 9.76 - quite close but not enough
and so long until you reach a precision you wish to have, for example:
3.162277660168379 :)
alternatively you can go to the nearest shop and buy a decent calculator or use a computer you used to write this post :)
