We look at the division of 51840966 by 139 
Let's see how many times 139 fits into 51840966.

Let's proceed to step 1:
139 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 139

On to step 2:
139 can be fit into 51 0 times, resulting in a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Bring next digit (8) of the dividend behind the 51 and repeat the process: 518 / 139

Let's proceed to step 3:
If we divide 518 by 139, we get 3 and a remainder of 101.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 417 from 518, we get 101.
Fetch the next digit (4) from the dividend, attach it to 101 and continue: 1014 / 139

Advancing to step 4:
The number 139 fits into 1014 7 times, leaving a remainder of 41.
Write down 7 as next digit of the result. 
Result so far: 37.0
If we take 973 away from 1014, we end up with 41.
Bring next digit (0) of the dividend behind the 41 and repeat the process: 410 / 139

Step 5:
The number 139 fits into 410 2 times, leaving a remainder of 132.
Put 2 as the next digit of the answer. 
Result so far: 372.0
If we take 278 away from 410, we end up with 132.
Take the next digit (9) from the dividend and append it to 132, then repeat: 1329 / 139

Going ahead to step 6:
When dividing 1329 by 139, we get 9 with a remainder of 78.
Use 9 as the next digit of our solution. 
Result so far: 3729.0
If we take 1251 away from 1329, we end up with 78.
Bring next digit (6) of the dividend behind the 78 and repeat the process: 786 / 139

Advancing to step 7:
139 goes into 786 5 times with a remainder of 91.
Use 5 as the next digit of our solution. 
Result so far: 37295.0
Subtract 695 from 786 to get 91.
Append the next digit (6) from the dividend to 91 and continue with: 916 / 139

Going ahead to step 8:
The number 139 fits into 916 6 times, leaving a remainder of 82.
The next digit of our result is 6. 
Result so far: 372956.0
Subtract 834 from 916 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

On to step 9:
820 divided by 139 is 5 with a remainder of 125.
Use 5 as the next digit of our solution. 
Result so far: 372956.5
Subtracting 695 from 820 leaves us with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

On to step 10:
The number 139 fits into 1250 8 times, leaving a remainder of 138.
Use 8 as the next digit of our solution. 
Result so far: 372956.58
Subtracting 1112 from 1250 leaves us with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

On to step 11:
1380 divided by 139 is 9 with a remainder of 129.
Use 9 as the next digit of our solution. 
Result so far: 372956.589
Subtract 1251 from 1380 to get 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

On to step 12:
The number 139 fits into 1290 9 times, leaving a remainder of 39.
Use 9 as the next digit of our solution. 
Result so far: 372956.5899
Deduct 1251 from 1290 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

The quotient of the division is 372956.5899, and the remainder is 0.00039.