Let's divide 1203870 by 999
We want to divide 1203870 by 999.

Advancing to step 1:
1 divided by 999 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 999

On to step 2:
The number 999 fits into 12 0 times, leaving a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Fetch the next digit (0) from the dividend, attach it to 12 and continue: 120 / 999

Advancing to step 3:
999 can be fit into 120 0 times, resulting in a remainder of 120.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 120 to get 120.
Include the next digit (3) from the dividend after 120, then repeat: 1203 / 999

Going ahead to step 4:
If we divide 1203 by 999, we get 1 and a remainder of 204.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 999 from 1203 leaves us with 204.
Append the next digit (8) from the dividend to 204 and continue with: 2048 / 999

Step 5:
When dividing 2048 by 999, we get 2 with a remainder of 50.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Subtracting 1998 from 2048 leaves us with 50.
Include the next digit (7) from the dividend after 50, then repeat: 507 / 999

On to step 6:
999 goes into 507 0 times with a remainder of 507.
The next digit of our result is 0. 
Result so far: 120.0
If we take 0 away from 507, we end up with 507.
Fetch the next digit (0) from the dividend, attach it to 507 and continue: 5070 / 999

Moving on to step 7:
5070 divided by 999 is 5 with a remainder of 75.
The next digit of our result is 5. 
Result so far: 1205.0
The remainder is 75 after subtracting 4995 from 5070.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Moving on to step 8:
If we divide 750 by 999, we get 0 and a remainder of 750.
Use 0 as the next digit of our solution. 
Result so far: 1205.0
Subtracting 0 from 750 leaves us with 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7500, and continue the process.

Advancing to step 9:
When dividing 7500 by 999, we get 7 with a remainder of 507.
Put 7 as the next digit of the answer. 
Result so far: 1205.07
Subtracting 6993 from 7500 leaves us with 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

Moving on to step 10:
5070 divided by 999 is 5 with a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 1205.075
Deduct 4995 from 5070 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 11:
When dividing 750 by 999, we get 0 with a remainder of 750.
Use 0 as the next digit of our solution. 
Result so far: 1205.075
The remainder is 750 after subtracting 0 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7500, and continue the process.

Let's proceed to step 12:
7500 divided by 999 is 7 with a remainder of 507.
Write down 7 as next digit of the result. 
Result so far: 1205.07507
If we take 6993 away from 7500, we end up with 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

Going ahead to step 13:
The number 999 fits into 5070 5 times, leaving a remainder of 75.
Use 5 as the next digit of our solution. 
Result so far: 1205.075075
If we take 4995 away from 5070, we end up with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Going ahead to step 14:
750 divided by 999 is 0 with a remainder of 750.
The number 0 becomes the next digit in our result. 
Result so far: 1205.075075
Deduct 0 from 750 and we're left with 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7500, and continue the process.

Advancing to step 15:
If we divide 7500 by 999, we get 7 and a remainder of 507.
The number 7 becomes the next digit in our result. 
Result so far: 1205.07507507
If we subtract 6993 from 7500, we get 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

The final result is 1205.07507507 with a remainder of 5.07e-07.