158199 ÷ 78 
We want to figure out the number of times 158199 can be divided by 78.

On to step 1:
The number 78 fits into 1 0 times, leaving 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 (5) from the dividend to 1 and continue with: 15 / 78

Let's proceed to step 2:
78 can be fit into 15 0 times, resulting in a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Append the next digit (8) from the dividend to 15 and continue with: 158 / 78

Let's proceed to step 3:
If we divide 158 by 78, we get 2 and a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 156 from 158 and we're left with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 78

Moving on to step 4:
When dividing 21 by 78, we get 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 20.0
If we subtract 0 from 21, we get 21.
Include the next digit (9) from the dividend after 21, then repeat: 219 / 78

Step 5:
If we divide 219 by 78, we get 2 and a remainder of 63.
Put 2 as the next digit of the answer. 
Result so far: 202.0
If we take 156 away from 219, we end up with 63.
Fetch the next digit (9) from the dividend, attach it to 63 and continue: 639 / 78

On to step 6:
The number 78 fits into 639 8 times, leaving a remainder of 15.
Put 8 as the next digit of the answer. 
Result so far: 2028.0
If we subtract 624 from 639, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 7:
If we divide 150 by 78, we get 1 and a remainder of 72.
The number 1 becomes the next digit in our result. 
Result so far: 2028.1
If we subtract 78 from 150, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 8:
78 can be fit into 720 9 times, resulting in a remainder of 18.
Record the quotient 9 as the next digit in the result. 
Result so far: 2028.19
Subtracting 702 from 720 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.

Going ahead to step 9:
When dividing 180 by 78, we get 2 with a remainder of 24.
Record the quotient 2 as the next digit in the result. 
Result so far: 2028.192
If we take 156 away from 180, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 10:
When dividing 240 by 78, we get 3 with a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 2028.1923
Subtracting 234 from 240 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 11:
When dividing 60 by 78, we get 0 with a remainder of 60.
The next digit of our result is 0. 
Result so far: 2028.1923
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 12:
If we divide 600 by 78, we get 7 and a remainder of 54.
The number 7 becomes the next digit in our result. 
Result so far: 2028.192307
If we take 546 away from 600, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 13:
540 divided by 78 is 6 with a remainder of 72.
Write down 6 as next digit of the result. 
Result so far: 2028.1923076
Subtracting 468 from 540 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 14:
The number 78 fits into 720 9 times, leaving a remainder of 18.
Record the quotient 9 as the next digit in the result. 
Result so far: 2028.19230769
If we take 702 away from 720, we end up 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.

After the division, we end up with 2028.19230769 and a remainder of 1.8e-08.