65 ÷ 1 = 65 R0
We're going to perform division on 65 with 1 as the divisor.

Step 1:
1 goes into 6 6 times with a remainder of 0.
Write down 6 as next digit of of the result. 
Result so far: 6
Subtract 6 from 6 to get 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 1

Step 2:
1 goes into 5 5 times with a remainder of 0.
Write down 5 as next digit of of the result. 
Result so far: 65
Subtract 5 from 5 to get 0.

The final result is 65 with a remainder of 0.