We look at the division of 51888166 by 840 
We want to divide 51888166 by 840.

Step 1:
When dividing 5 by 840, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 840

Let's proceed to step 2:
The number 840 fits into 51 0 times, leaving a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Take the next digit (8) from the dividend and append it to 51, then repeat: 518 / 840

Advancing to step 3:
840 can be fit into 518 0 times, resulting in a remainder of 518.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 518, we end up with 518.
Append the next digit (8) from the dividend to 518 and continue with: 5188 / 840

Going ahead to step 4:
If we divide 5188 by 840, we get 6 and a remainder of 148.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 5040 from 5188 to get 148.
Grab the next digit (8) from the dividend, add it to 148, then carry on: 1488 / 840

Moving on to step 5:
When dividing 1488 by 840, we get 1 with a remainder of 648.
The next digit of our result is 1. 
Result so far: 61.0
Subtract 840 from 1488 to get 648.
Take the next digit (1) from the dividend and append it to 648, then repeat: 6481 / 840

Step 6:
When dividing 6481 by 840, we get 7 with a remainder of 601.
Record the quotient 7 as the next digit in the result. 
Result so far: 617.0
If we take 5880 away from 6481, we end up with 601.
Append the next digit (6) from the dividend to 601 and continue with: 6016 / 840

On to step 7:
6016 divided by 840 is 7 with a remainder of 136.
Record the quotient 7 as the next digit in the result. 
Result so far: 6177.0
The remainder is 136 after subtracting 5880 from 6016.
Bring next digit (6) of the dividend behind the 136 and repeat the process: 1366 / 840

Advancing to step 8:
If we divide 1366 by 840, we get 1 and a remainder of 526.
Write down 1 as next digit of the result. 
Result so far: 61771.0
Subtract 840 from 1366 to get 526.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5260, and continue the process.

Moving on to step 9:
The number 840 fits into 5260 6 times, leaving a remainder of 220.
The next digit of our result is 6. 
Result so far: 61771.6
Subtract 5040 from 5260 to get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 10:
840 can be fit into 2200 2 times, resulting in a remainder of 520.
Record the quotient 2 as the next digit in the result. 
Result so far: 61771.62
Subtracting 1680 from 2200 leaves us with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Step 11:
840 goes into 5200 6 times with a remainder of 160.
The number 6 becomes the next digit in our result. 
Result so far: 61771.626
The remainder is 160 after subtracting 5040 from 5200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 12:
When dividing 1600 by 840, we get 1 with a remainder of 760.
Use 1 as the next digit of our solution. 
Result so far: 61771.6261
Subtracting 840 from 1600 leaves us with 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

Step 13:
840 can be fit into 7600 9 times, resulting in a remainder of 40.
Put 9 as the next digit of the answer. 
Result so far: 61771.62619
Subtracting 7560 from 7600 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 14:
840 can be fit into 400 0 times, resulting in a remainder of 400.
Use 0 as the next digit of our solution. 
Result so far: 61771.62619
Subtract 0 from 400 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Let's proceed to step 15:
If we divide 4000 by 840, we get 4 and a remainder of 640.
Put 4 as the next digit of the answer. 
Result so far: 61771.6261904
Subtracting 3360 from 4000 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Moving on to step 16:
The number 840 fits into 6400 7 times, leaving a remainder of 520.
The next digit of our result is 7. 
Result so far: 61771.62619047
The remainder is 520 after subtracting 5880 from 6400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Our division results in 61771.62619047 with a remaining 5.2e-07.