90261791 ÷ 39 
We want to divide 90261791 by 39.

Let's proceed to step 1:
When dividing 9 by 39, we get 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 39

Moving on to step 2:
39 can be fit into 90 2 times, resulting in a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 78 from 90 and we're left with 12.
Grab the next digit (2) from the dividend, add it to 12, then carry on: 122 / 39

On to step 3:
When dividing 122 by 39, we get 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 23.0
If we subtract 117 from 122, we get 5.
Append the next digit (6) from the dividend to 5 and continue with: 56 / 39

Moving on to step 4:
39 can be fit into 56 1 times, resulting in a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 231.0
Subtracting 39 from 56 leaves us with 17.
Take the next digit (1) from the dividend and append it to 17, then repeat: 171 / 39

Step 5:
When dividing 171 by 39, we get 4 with a remainder of 15.
The number 4 becomes the next digit in our result. 
Result so far: 2314.0
Subtract 156 from 171 to get 15.
Grab the next digit (7) from the dividend, add it to 15, then carry on: 157 / 39

Moving on to step 6:
When dividing 157 by 39, we get 4 with a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 23144.0
Subtracting 156 from 157 leaves us with 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 39

Step 7:
39 goes into 19 0 times with a remainder of 19.
The number 0 becomes the next digit in our result. 
Result so far: 231440.0
If we subtract 0 from 19, we get 19.
Bring next digit (1) of the dividend behind the 19 and repeat the process: 191 / 39

Let's proceed to step 8:
If we divide 191 by 39, we get 4 and a remainder of 35.
The next digit of our result is 4. 
Result so far: 2314404.0
Subtract 156 from 191 to get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 9:
39 goes into 350 8 times with a remainder of 38.
The next digit of our result is 8. 
Result so far: 2314404.8
Subtracting 312 from 350 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 10:
39 goes into 380 9 times with a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 2314404.89
The remainder is 29 after subtracting 351 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 11:
290 divided by 39 is 7 with a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 2314404.897
The remainder is 17 after subtracting 273 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 12:
170 divided by 39 is 4 with a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 2314404.8974
The remainder is 14 after subtracting 156 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 13:
140 divided by 39 is 3 with a remainder of 23.
Record the quotient 3 as the next digit in the result. 
Result so far: 2314404.89743
Subtract 117 from 140 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 14:
39 goes into 230 5 times with a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 2314404.897435
If we subtract 195 from 230, we get 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 15:
If we divide 350 by 39, we get 8 and a remainder of 38.
The number 8 becomes the next digit in our result. 
Result so far: 2314404.8974358
Subtract 312 from 350 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 16:
39 can be fit into 380 9 times, resulting in a remainder of 29.
The number 9 becomes the next digit in our result. 
Result so far: 2314404.89743589
If we subtract 351 from 380, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

In conclusion, the division gives 2314404.89743589 with a balance of 2.9e-08.