20861 divided by 19 
We want to figure out the number of times 20861 can be divided by 19.

On to step 1:
If we divide 2 by 19, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 19

Going ahead to step 2:
19 can be fit into 20 1 times, resulting in a remainder of 1.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 19 from 20 and we're left with 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 19

Advancing to step 3:
The number 19 fits into 18 0 times, leaving a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Subtracting 0 from 18 leaves us with 18.
Take the next digit (6) from the dividend and append it to 18, then repeat: 186 / 19

Going ahead to step 4:
19 can be fit into 186 9 times, resulting in a remainder of 15.
Record the quotient 9 as the next digit in the result. 
Result so far: 109.0
If we take 171 away from 186, we end up with 15.
Take the next digit (1) from the dividend and append it to 15, then repeat: 151 / 19

On to step 5:
19 can be fit into 151 7 times, resulting in a remainder of 18.
Put 7 as the next digit of the answer. 
Result so far: 1097.0
Deduct 133 from 151 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 6:
When dividing 180 by 19, we get 9 with a remainder of 9.
The next digit of our result is 9. 
Result so far: 1097.9
Subtracting 171 from 180 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
90 divided by 19 is 4 with a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 1097.94
Subtracting 76 from 90 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 8:
If we divide 140 by 19, we get 7 and a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 1097.947
If we subtract 133 from 140, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 9:
The number 19 fits into 70 3 times, leaving a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 1097.9473
The remainder is 13 after subtracting 57 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 10:
When dividing 130 by 19, we get 6 with a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 1097.94736
The remainder is 16 after subtracting 114 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 11:
When dividing 160 by 19, we get 8 with a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 1097.947368
If we take 152 away from 160, we end up 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.

Moving on to step 12:
When dividing 80 by 19, we get 4 with a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 1097.9473684
The remainder is 4 after subtracting 76 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 13:
40 divided by 19 is 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 1097.94736842
Subtract 38 from 40 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

After the division, we end up with 1097.94736842 and a remainder of 2e-09.