Let's divide 803161 by 42
We're looking to find how many times 42 goes into 803161.

Moving on to step 1:
42 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 42

Let's proceed to step 2:
42 can be fit into 80 1 times, resulting in a remainder of 38.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 38 after subtracting 42 from 80.
Append the next digit (3) from the dividend to 38 and continue with: 383 / 42

Advancing to step 3:
42 can be fit into 383 9 times, resulting in a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
Deduct 378 from 383 and we're left with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 42

Step 4:
When dividing 51 by 42, we get 1 with a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 191.0
If we take 42 away from 51, we end up with 9.
Bring next digit (6) of the dividend behind the 9 and repeat the process: 96 / 42

On to step 5:
96 divided by 42 is 2 with a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 1912.0
Subtract 84 from 96 to get 12.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 42

Going ahead to step 6:
121 divided by 42 is 2 with a remainder of 37.
Put 2 as the next digit of the answer. 
Result so far: 19122.0
Subtracting 84 from 121 leaves us with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 7:
The number 42 fits into 370 8 times, leaving a remainder of 34.
Put 8 as the next digit of the answer. 
Result so far: 19122.8
If we take 336 away from 370, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 8:
When dividing 340 by 42, we get 8 with a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 19122.88
The remainder is 4 after subtracting 336 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 19122.88, with a leftover of 0.004.