12302 ÷ 1 = 12302 R0
Alright, let's work through the division of 12302 by 1 step by step.

Step 1:
1 goes into 1 1 times with a remainder of 0.
Write down 1 as next digit of of the result. 
Result so far: 1
Subtract 1 from 1 to get 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 1

Step 2:
1 goes into 2 2 times with a remainder of 0.
Write down 2 as next digit of of the result. 
Result so far: 12
Subtract 2 from 2 to get 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 1

Step 3:
1 goes into 3 3 times with a remainder of 0.
Write down 3 as next digit of of the result. 
Result so far: 123
Subtract 3 from 3 to get 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 1

Step 4:
1 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of of the result. 
Result so far: 1230
Subtract 0 from 0 to get 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 1

Step 5:
1 goes into 2 2 times with a remainder of 0.
Write down 2 as next digit of of the result. 
Result so far: 12302
Subtract 2 from 2 to get 0.

The final result is 12302 with a remainder of 0.