51686031 ÷ 181 
We want to figure out the number of times 51686031 can be divided by 181.

Step 1:
The number 181 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 181

Let's proceed to step 2:
181 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
Deduct 0 from 51 and we're left with 51.
Include the next digit (6) from the dividend after 51, then repeat: 516 / 181

On to step 3:
181 can be fit into 516 2 times, resulting in a remainder of 154.
The next digit of our result is 2. 
Result so far: 2.0
If we take 362 away from 516, we end up with 154.
Append the next digit (8) from the dividend to 154 and continue with: 1548 / 181

Going ahead to step 4:
When dividing 1548 by 181, we get 8 with a remainder of 100.
The next digit of our result is 8. 
Result so far: 28.0
Subtract 1448 from 1548 to get 100.
Bring next digit (6) of the dividend behind the 100 and repeat the process: 1006 / 181

Going ahead to step 5:
1006 divided by 181 is 5 with a remainder of 101.
Put 5 as the next digit of the answer. 
Result so far: 285.0
Subtracting 905 from 1006 leaves us with 101.
Grab the next digit (0) from the dividend, add it to 101, then carry on: 1010 / 181

Going ahead to step 6:
181 can be fit into 1010 5 times, resulting in a remainder of 105.
Write down 5 as next digit of the result. 
Result so far: 2855.0
The remainder is 105 after subtracting 905 from 1010.
Include the next digit (3) from the dividend after 105, then repeat: 1053 / 181

Advancing to step 7:
The number 181 fits into 1053 5 times, leaving a remainder of 148.
The next digit of our result is 5. 
Result so far: 28555.0
If we take 905 away from 1053, we end up with 148.
Fetch the next digit (1) from the dividend, attach it to 148 and continue: 1481 / 181

On to step 8:
181 can be fit into 1481 8 times, resulting in a remainder of 33.
The next digit of our result is 8. 
Result so far: 285558.0
If we subtract 1448 from 1481, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 9:
If we divide 330 by 181, we get 1 and a remainder of 149.
The next digit of our result is 1. 
Result so far: 285558.1
Subtracting 181 from 330 leaves us with 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Advancing to step 10:
If we divide 1490 by 181, we get 8 and a remainder of 42.
The next digit of our result is 8. 
Result so far: 285558.18
If we take 1448 away from 1490, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Step 11:
181 can be fit into 420 2 times, resulting in a remainder of 58.
The number 2 becomes the next digit in our result. 
Result so far: 285558.182
If we subtract 362 from 420, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 12:
If we divide 580 by 181, we get 3 and a remainder of 37.
The next digit of our result is 3. 
Result so far: 285558.1823
If we take 543 away from 580, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

On to step 13:
181 goes into 370 2 times with a remainder of 8.
The next digit of our result is 2. 
Result so far: 285558.18232
Deduct 362 from 370 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 14:
When dividing 80 by 181, we get 0 with a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 285558.18232
If we take 0 away from 80, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 15:
181 can be fit into 800 4 times, resulting in a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 285558.1823204
If we subtract 724 from 800, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 16:
When dividing 760 by 181, we get 4 with a remainder of 36.
The next digit of our result is 4. 
Result so far: 285558.18232044
Subtract 724 from 760 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

After the division, we end up with 285558.18232044 and a remainder of 3.6e-08.