We're dividing 21506470 by 91 
We want to figure out the number of times 21506470 can be divided by 91.

Moving on to step 1:
When dividing 2 by 91, we get 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 91

Going ahead to step 2:
The number 91 fits into 21 0 times, leaving a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Grab the next digit (5) from the dividend, add it to 21, then carry on: 215 / 91

Going ahead to step 3:
The number 91 fits into 215 2 times, leaving a remainder of 33.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 182 from 215 and we're left with 33.
Fetch the next digit (0) from the dividend, attach it to 33 and continue: 330 / 91

Moving on to step 4:
The number 91 fits into 330 3 times, leaving a remainder of 57.
Use 3 as the next digit of our solution. 
Result so far: 23.0
The remainder is 57 after subtracting 273 from 330.
Include the next digit (6) from the dividend after 57, then repeat: 576 / 91

Step 5:
91 goes into 576 6 times with a remainder of 30.
Record the quotient 6 as the next digit in the result. 
Result so far: 236.0
Subtracting 546 from 576 leaves us with 30.
Append the next digit (4) from the dividend to 30 and continue with: 304 / 91

Moving on to step 6:
91 can be fit into 304 3 times, resulting in a remainder of 31.
The next digit of our result is 3. 
Result so far: 2363.0
The remainder is 31 after subtracting 273 from 304.
Append the next digit (7) from the dividend to 31 and continue with: 317 / 91

Advancing to step 7:
91 goes into 317 3 times with a remainder of 44.
Use 3 as the next digit of our solution. 
Result so far: 23633.0
If we take 273 away from 317, we end up with 44.
Append the next digit (0) from the dividend to 44 and continue with: 440 / 91

Going ahead to step 8:
440 divided by 91 is 4 with a remainder of 76.
The next digit of our result is 4. 
Result so far: 236334.0
Deduct 364 from 440 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Advancing to step 9:
760 divided by 91 is 8 with a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 236334.8
If we take 728 away from 760, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 10:
320 divided by 91 is 3 with a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 236334.83
The remainder is 47 after subtracting 273 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 11:
When dividing 470 by 91, we get 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 236334.835
Deduct 455 from 470 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 12:
91 can be fit into 150 1 times, resulting in a remainder of 59.
Write down 1 as next digit of the result. 
Result so far: 236334.8351
Subtracting 91 from 150 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 13:
590 divided by 91 is 6 with a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 236334.83516
If we subtract 546 from 590, we get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 14:
91 can be fit into 440 4 times, resulting in a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 236334.835164
Subtract 364 from 440 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 15:
760 divided by 91 is 8 with a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 236334.8351648
Deduct 728 from 760 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 16:
91 goes into 320 3 times with a remainder of 47.
The next digit of our result is 3. 
Result so far: 236334.83516483
Subtract 273 from 320 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Our division results in 236334.83516483 with a remaining 4.7e-08.