78312387 ÷ 198 
We want to divide 78312387 by 198.

Moving on to step 1:
When dividing 7 by 198, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 198

Let's proceed to step 2:
If we divide 78 by 198, we get 0 and a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Fetch the next digit (3) from the dividend, attach it to 78 and continue: 783 / 198

Moving on to step 3:
198 can be fit into 783 3 times, resulting in a remainder of 189.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 594 from 783 leaves us with 189.
Grab the next digit (1) from the dividend, add it to 189, then carry on: 1891 / 198

Step 4:
198 goes into 1891 9 times with a remainder of 109.
The next digit of our result is 9. 
Result so far: 39.0
Subtract 1782 from 1891 to get 109.
Include the next digit (2) from the dividend after 109, then repeat: 1092 / 198

Going ahead to step 5:
198 goes into 1092 5 times with a remainder of 102.
The number 5 becomes the next digit in our result. 
Result so far: 395.0
Subtracting 990 from 1092 leaves us with 102.
Take the next digit (3) from the dividend and append it to 102, then repeat: 1023 / 198

On to step 6:
1023 divided by 198 is 5 with a remainder of 33.
The number 5 becomes the next digit in our result. 
Result so far: 3955.0
If we subtract 990 from 1023, we get 33.
Append the next digit (8) from the dividend to 33 and continue with: 338 / 198

Advancing to step 7:
198 can be fit into 338 1 times, resulting in a remainder of 140.
The next digit of our result is 1. 
Result so far: 39551.0
If we subtract 198 from 338, we get 140.
Bring next digit (7) of the dividend behind the 140 and repeat the process: 1407 / 198

Step 8:
198 can be fit into 1407 7 times, resulting in a remainder of 21.
The number 7 becomes the next digit in our result. 
Result so far: 395517.0
Deduct 1386 from 1407 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 9:
210 divided by 198 is 1 with a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 395517.1
Subtracting 198 from 210 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 10:
198 goes into 120 0 times with a remainder of 120.
Use 0 as the next digit of our solution. 
Result so far: 395517.1
Deduct 0 from 120 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 11:
The number 198 fits into 1200 6 times, leaving a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 395517.106
The remainder is 12 after subtracting 1188 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 12:
198 can be fit into 120 0 times, resulting in a remainder of 120.
Record the quotient 0 as the next digit in the result. 
Result so far: 395517.106
If we take 0 away from 120, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 13:
If we divide 1200 by 198, we get 6 and a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 395517.10606
Subtract 1188 from 1200 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 14:
The number 198 fits into 120 0 times, leaving a remainder of 120.
Put 0 as the next digit of the answer. 
Result so far: 395517.10606
Subtracting 0 from 120 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 15:
When dividing 1200 by 198, we get 6 with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 395517.1060606
The remainder is 12 after subtracting 1188 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 16:
198 can be fit into 120 0 times, resulting in a remainder of 120.
Use 0 as the next digit of our solution. 
Result so far: 395517.1060606
The remainder is 120 after subtracting 0 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

The final result is 395517.1060606 with a remainder of 1.2e-07.