Let's divide 400851 by 50
Let's see how many times 50 fits into 400851.

Advancing to step 1:
50 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 50

Moving on to step 2:
If we divide 40 by 50, we get 0 and a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Take the next digit (0) from the dividend and append it to 40, then repeat: 400 / 50

Going ahead to step 3:
The number 50 fits into 400 8 times, leaving a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 8.0
The remainder is 0 after subtracting 400 from 400.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 50

On to step 4:
50 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 80.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 50

Let's proceed to step 5:
50 goes into 85 1 times with a remainder of 35.
The number 1 becomes the next digit in our result. 
Result so far: 801.0
If we take 50 away from 85, we end up with 35.
Fetch the next digit (1) from the dividend, attach it to 35 and continue: 351 / 50

Moving on to step 6:
The number 50 fits into 351 7 times, leaving a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 8017.0
Subtract 350 from 351 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 7:
When dividing 10 by 50, we get 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 8017.0
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
If we divide 100 by 50, we get 2 and a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 8017.02
Deduct 100 from 100 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
0 divided by 50 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 8017.02
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.

On to step 10:
50 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 8017.02
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.

The final outcome is 8017.02, with a leftover of 0.0.