45851574 ÷ 851 
Our goal is to divide 45851574 by 851.

On to step 1:
The number 851 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 851

Let's proceed to step 2:
If we divide 45 by 851, we get 0 and a remainder of 45.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 45, we end up with 45.
Grab the next digit (8) from the dividend, add it to 45, then carry on: 458 / 851

Let's proceed to step 3:
851 can be fit into 458 0 times, resulting in a remainder of 458.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 458, we get 458.
Bring next digit (5) of the dividend behind the 458 and repeat the process: 4585 / 851

Step 4:
When dividing 4585 by 851, we get 5 with a remainder of 330.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtract 4255 from 4585 to get 330.
Append the next digit (1) from the dividend to 330 and continue with: 3301 / 851

Advancing to step 5:
851 goes into 3301 3 times with a remainder of 748.
Record the quotient 3 as the next digit in the result. 
Result so far: 53.0
The remainder is 748 after subtracting 2553 from 3301.
Grab the next digit (5) from the dividend, add it to 748, then carry on: 7485 / 851

Step 6:
851 can be fit into 7485 8 times, resulting in a remainder of 677.
Write down 8 as next digit of the result. 
Result so far: 538.0
The remainder is 677 after subtracting 6808 from 7485.
Fetch the next digit (7) from the dividend, attach it to 677 and continue: 6777 / 851

Going ahead to step 7:
851 can be fit into 6777 7 times, resulting in a remainder of 820.
Use 7 as the next digit of our solution. 
Result so far: 5387.0
Deduct 5957 from 6777 and we're left with 820.
Take the next digit (4) from the dividend and append it to 820, then repeat: 8204 / 851

Going ahead to step 8:
851 goes into 8204 9 times with a remainder of 545.
Record the quotient 9 as the next digit in the result. 
Result so far: 53879.0
Subtracting 7659 from 8204 leaves us with 545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5450, and continue the process.

Advancing to step 9:
When dividing 5450 by 851, we get 6 with a remainder of 344.
The next digit of our result is 6. 
Result so far: 53879.6
Deduct 5106 from 5450 and we're left with 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Step 10:
If we divide 3440 by 851, we get 4 and a remainder of 36.
Use 4 as the next digit of our solution. 
Result so far: 53879.64
Deduct 3404 from 3440 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 11:
360 divided by 851 is 0 with a remainder of 360.
Use 0 as the next digit of our solution. 
Result so far: 53879.64
Subtracting 0 from 360 leaves us with 360.
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 12:
851 can be fit into 3600 4 times, resulting in a remainder of 196.
Record the quotient 4 as the next digit in the result. 
Result so far: 53879.6404
Subtracting 3404 from 3600 leaves us with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Moving on to step 13:
1960 divided by 851 is 2 with a remainder of 258.
The number 2 becomes the next digit in our result. 
Result so far: 53879.64042
If we subtract 1702 from 1960, we get 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Let's proceed to step 14:
The number 851 fits into 2580 3 times, leaving a remainder of 27.
Record the quotient 3 as the next digit in the result. 
Result so far: 53879.640423
Subtract 2553 from 2580 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 15:
The number 851 fits into 270 0 times, leaving a remainder of 270.
The number 0 becomes the next digit in our result. 
Result so far: 53879.640423
Deduct 0 from 270 and we're left with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

On to step 16:
When dividing 2700 by 851, we get 3 with a remainder of 147.
Put 3 as the next digit of the answer. 
Result so far: 53879.64042303
If we subtract 2553 from 2700, we get 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

The final outcome is 53879.64042303, with a leftover of 1.47e-07.