18339603 divided by 861 
Our goal is to divide 18339603 by 861.

Let's proceed to step 1:
The number 861 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 861

On to step 2:
861 can be fit into 18 0 times, resulting in a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 18 and we're left with 18.
Append the next digit (3) from the dividend to 18 and continue with: 183 / 861

Moving on to step 3:
861 can be fit into 183 0 times, resulting in a remainder of 183.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 183 and we're left with 183.
Fetch the next digit (3) from the dividend, attach it to 183 and continue: 1833 / 861

Moving on to step 4:
1833 divided by 861 is 2 with a remainder of 111.
The next digit of our result is 2. 
Result so far: 2.0
If we take 1722 away from 1833, we end up with 111.
Bring next digit (9) of the dividend behind the 111 and repeat the process: 1119 / 861

On to step 5:
861 can be fit into 1119 1 times, resulting in a remainder of 258.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Subtract 861 from 1119 to get 258.
Include the next digit (6) from the dividend after 258, then repeat: 2586 / 861

Going ahead to step 6:
861 can be fit into 2586 3 times, resulting in a remainder of 3.
The next digit of our result is 3. 
Result so far: 213.0
Subtracting 2583 from 2586 leaves us with 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 861

Advancing to step 7:
861 goes into 30 0 times with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 2130.0
Deduct 0 from 30 and we're left with 30.
Bring next digit (3) of the dividend behind the 30 and repeat the process: 303 / 861

Let's proceed to step 8:
303 divided by 861 is 0 with a remainder of 303.
Use 0 as the next digit of our solution. 
Result so far: 21300.0
Deduct 0 from 303 and we're left with 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

Moving on to step 9:
If we divide 3030 by 861, we get 3 and a remainder of 447.
The number 3 becomes the next digit in our result. 
Result so far: 21300.3
The remainder is 447 after subtracting 2583 from 3030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4470, and continue the process.

Let's proceed to step 10:
861 goes into 4470 5 times with a remainder of 165.
Write down 5 as next digit of the result. 
Result so far: 21300.35
The remainder is 165 after subtracting 4305 from 4470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Let's proceed to step 11:
When dividing 1650 by 861, we get 1 with a remainder of 789.
Record the quotient 1 as the next digit in the result. 
Result so far: 21300.351
If we subtract 861 from 1650, we get 789.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7890, and continue the process.

Going ahead to step 12:
861 can be fit into 7890 9 times, resulting in a remainder of 141.
Use 9 as the next digit of our solution. 
Result so far: 21300.3519
Deduct 7749 from 7890 and we're left with 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Going ahead to step 13:
The number 861 fits into 1410 1 times, leaving a remainder of 549.
Write down 1 as next digit of the result. 
Result so far: 21300.35191
If we take 861 away from 1410, we end up with 549.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5490, and continue the process.

Advancing to step 14:
861 goes into 5490 6 times with a remainder of 324.
Use 6 as the next digit of our solution. 
Result so far: 21300.351916
Subtracting 5166 from 5490 leaves us with 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Moving on to step 15:
861 goes into 3240 3 times with a remainder of 657.
The next digit of our result is 3. 
Result so far: 21300.3519163
Subtract 2583 from 3240 to get 657.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6570, and continue the process.

On to step 16:
861 goes into 6570 7 times with a remainder of 543.
The next digit of our result is 7. 
Result so far: 21300.35191637
Subtract 6027 from 6570 to get 543.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5430, and continue the process.

In conclusion, the division gives 21300.35191637 with a balance of 5.43e-07.