91439778 divided by 10 
We want to figure out the number of times 91439778 can be divided by 10.

Step 1:
If we divide 9 by 10, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 10

Step 2:
10 goes into 91 9 times with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 90 from 91 and we're left with 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 10

On to step 3:
14 divided by 10 is 1 with a remainder of 4.
The next digit of our result is 1. 
Result so far: 91.0
Subtract 10 from 14 to get 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 10

Advancing to step 4:
10 goes into 43 4 times with a remainder of 3.
Use 4 as the next digit of our solution. 
Result so far: 914.0
Subtracting 40 from 43 leaves us with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 10

Step 5:
When dividing 39 by 10, we get 3 with a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 9143.0
The remainder is 9 after subtracting 30 from 39.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 10

Let's proceed to step 6:
If we divide 97 by 10, we get 9 and a remainder of 7.
Use 9 as the next digit of our solution. 
Result so far: 91439.0
The remainder is 7 after subtracting 90 from 97.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 10

On to step 7:
The number 10 fits into 77 7 times, leaving a remainder of 7.
Write down 7 as next digit of the result. 
Result so far: 914397.0
Subtract 70 from 77 to get 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 10

Let's proceed to step 8:
10 can be fit into 78 7 times, resulting in a remainder of 8.
The next digit of our result is 7. 
Result so far: 9143977.0
Subtract 70 from 78 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 9:
The number 10 fits into 80 8 times, leaving a remainder of 0.
The next digit of our result is 8. 
Result so far: 9143977.8
Deduct 80 from 80 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 10:
If we divide 0 by 10, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 9143977.8
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
0 divided by 10 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 9143977.8
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 9143977.8 with a balance of 0.0.