We look at the division of 91090391 by 215 
We want to divide 91090391 by 215.

Step 1:
If we divide 9 by 215, we get 0 and a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 215

Advancing to step 2:
91 divided by 215 is 0 with a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 91 after subtracting 0 from 91.
Append the next digit (0) from the dividend to 91 and continue with: 910 / 215

Going ahead to step 3:
If we divide 910 by 215, we get 4 and a remainder of 50.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 860 from 910 to get 50.
Bring next digit (9) of the dividend behind the 50 and repeat the process: 509 / 215

Going ahead to step 4:
509 divided by 215 is 2 with a remainder of 79.
Write down 2 as next digit of the result. 
Result so far: 42.0
If we subtract 430 from 509, we get 79.
Take the next digit (0) from the dividend and append it to 79, then repeat: 790 / 215

Let's proceed to step 5:
215 goes into 790 3 times with a remainder of 145.
Write down 3 as next digit of the result. 
Result so far: 423.0
Subtract 645 from 790 to get 145.
Grab the next digit (3) from the dividend, add it to 145, then carry on: 1453 / 215

On to step 6:
215 goes into 1453 6 times with a remainder of 163.
Put 6 as the next digit of the answer. 
Result so far: 4236.0
The remainder is 163 after subtracting 1290 from 1453.
Include the next digit (9) from the dividend after 163, then repeat: 1639 / 215

Let's proceed to step 7:
1639 divided by 215 is 7 with a remainder of 134.
Write down 7 as next digit of the result. 
Result so far: 42367.0
The remainder is 134 after subtracting 1505 from 1639.
Bring next digit (1) of the dividend behind the 134 and repeat the process: 1341 / 215

Going ahead to step 8:
215 goes into 1341 6 times with a remainder of 51.
The next digit of our result is 6. 
Result so far: 423676.0
Subtracting 1290 from 1341 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 9:
The number 215 fits into 510 2 times, leaving a remainder of 80.
Use 2 as the next digit of our solution. 
Result so far: 423676.2
Deduct 430 from 510 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 10:
215 goes into 800 3 times with a remainder of 155.
Record the quotient 3 as the next digit in the result. 
Result so far: 423676.23
Subtract 645 from 800 to get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Let's proceed to step 11:
215 can be fit into 1550 7 times, resulting in a remainder of 45.
Use 7 as the next digit of our solution. 
Result so far: 423676.237
The remainder is 45 after subtracting 1505 from 1550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 12:
When dividing 450 by 215, we get 2 with a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 423676.2372
Subtracting 430 from 450 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 13:
The number 215 fits into 200 0 times, leaving a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 423676.2372
If we take 0 away from 200, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

On to step 14:
215 can be fit into 2000 9 times, resulting in a remainder of 65.
The number 9 becomes the next digit in our result. 
Result so far: 423676.237209
Subtract 1935 from 2000 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 15:
650 divided by 215 is 3 with a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 423676.2372093
Subtract 645 from 650 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 16:
215 goes into 50 0 times with a remainder of 50.
The next digit of our result is 0. 
Result so far: 423676.2372093
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The quotient of the division is 423676.2372093, and the remainder is 5e-08.