We're dividing 161603 by 8 
We're looking to find how many times 8 goes into 161603.

On to step 1:
When dividing 1 by 8, we get 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 8

Advancing to step 2:
8 goes into 16 2 times with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 16 from 16, we get 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 8

Let's proceed to step 3:
The number 8 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 20.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 8

Going ahead to step 4:
The number 8 fits into 16 2 times, leaving a remainder of 0.
The next digit of our result is 2. 
Result so far: 202.0
The remainder is 0 after subtracting 16 from 16.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 8

Step 5:
If we divide 0 by 8, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 2020.0
Deduct 0 from 0 and we're left with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 8

Advancing to step 6:
8 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 20200.0
The remainder is 3 after subtracting 0 from 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 7:
8 goes into 30 3 times with a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 20200.3
If we subtract 24 from 30, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 8:
60 divided by 8 is 7 with a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 20200.37
Deduct 56 from 60 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 9:
When dividing 40 by 8, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 20200.375
The remainder is 0 after subtracting 40 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
0 divided by 8 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 20200.375
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 11:
If we divide 0 by 8, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 20200.375
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 20200.375, with a leftover of 0.0.