We look at the division of 43122166 by 806 
We want to divide 43122166 by 806.

Moving on to step 1:
When dividing 4 by 806, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 806

Advancing to step 2:
When dividing 43 by 806, we get 0 with a remainder of 43.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Include the next digit (1) from the dividend after 43, then repeat: 431 / 806

Moving on to step 3:
When dividing 431 by 806, we get 0 with a remainder of 431.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 431 and we're left with 431.
Include the next digit (2) from the dividend after 431, then repeat: 4312 / 806

Step 4:
If we divide 4312 by 806, we get 5 and a remainder of 282.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Deduct 4030 from 4312 and we're left with 282.
Include the next digit (2) from the dividend after 282, then repeat: 2822 / 806

Moving on to step 5:
806 goes into 2822 3 times with a remainder of 404.
Use 3 as the next digit of our solution. 
Result so far: 53.0
If we subtract 2418 from 2822, we get 404.
Take the next digit (1) from the dividend and append it to 404, then repeat: 4041 / 806

Let's proceed to step 6:
806 can be fit into 4041 5 times, resulting in a remainder of 11.
Record the quotient 5 as the next digit in the result. 
Result so far: 535.0
The remainder is 11 after subtracting 4030 from 4041.
Grab the next digit (6) from the dividend, add it to 11, then carry on: 116 / 806

Step 7:
The number 806 fits into 116 0 times, leaving a remainder of 116.
Write down 0 as next digit of the result. 
Result so far: 5350.0
Subtract 0 from 116 to get 116.
Take the next digit (6) from the dividend and append it to 116, then repeat: 1166 / 806

Step 8:
When dividing 1166 by 806, we get 1 with a remainder of 360.
Record the quotient 1 as the next digit in the result. 
Result so far: 53501.0
The remainder is 360 after subtracting 806 from 1166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 9:
806 goes into 3600 4 times with a remainder of 376.
The number 4 becomes the next digit in our result. 
Result so far: 53501.4
If we take 3224 away from 3600, we end up with 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

Moving on to step 10:
3760 divided by 806 is 4 with a remainder of 536.
Put 4 as the next digit of the answer. 
Result so far: 53501.44
Subtracting 3224 from 3760 leaves us with 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

The final outcome is 53501.44, with a leftover of 0.536.