We're dividing 123859 by 19 
We want to divide 123859 by 19.

Moving on to step 1:
19 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 19

Step 2:
19 goes into 12 0 times with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Take the next digit (3) from the dividend and append it to 12, then repeat: 123 / 19

Going ahead to step 3:
19 goes into 123 6 times with a remainder of 9.
Put 6 as the next digit of the answer. 
Result so far: 6.0
If we subtract 114 from 123, we get 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 19

Advancing to step 4:
19 can be fit into 98 5 times, resulting in a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 65.0
Deduct 95 from 98 and we're left with 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 19

Moving on to step 5:
35 divided by 19 is 1 with a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 651.0
If we take 19 away from 35, we end up with 16.
Bring next digit (9) of the dividend behind the 16 and repeat the process: 169 / 19

Moving on to step 6:
The number 19 fits into 169 8 times, leaving a remainder of 17.
Put 8 as the next digit of the answer. 
Result so far: 6518.0
Subtracting 152 from 169 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 7:
When dividing 170 by 19, we get 8 with a remainder of 18.
Use 8 as the next digit of our solution. 
Result so far: 6518.8
Subtracting 152 from 170 leaves us 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 8:
The number 19 fits into 180 9 times, leaving a remainder of 9.
Record the quotient 9 as the next digit in the result. 
Result so far: 6518.89
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 9:
19 goes into 90 4 times with a remainder of 14.
The next digit of our result is 4. 
Result so far: 6518.894
Subtract 76 from 90 to get 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 10:
When dividing 140 by 19, we get 7 with a remainder of 7.
The next digit of our result is 7. 
Result so far: 6518.8947
Subtract 133 from 140 to 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.

Step 11:
70 divided by 19 is 3 with a remainder of 13.
Record the quotient 3 as the next digit in the result. 
Result so far: 6518.89473
Subtract 57 from 70 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 12:
130 divided by 19 is 6 with a remainder of 16.
Put 6 as the next digit of the answer. 
Result so far: 6518.894736
If we take 114 away from 130, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 13:
160 divided by 19 is 8 with a remainder of 8.
The next digit of our result is 8. 
Result so far: 6518.8947368
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.

On to step 14:
The number 19 fits into 80 4 times, leaving a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 6518.89473684
If we take 76 away from 80, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 6518.89473684 and a remainder of 4e-09.