41540217 ÷ 21 
We want to figure out the number of times 41540217 can be divided by 21.

On to step 1:
When dividing 4 by 21, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 21

Step 2:
When dividing 41 by 21, we get 1 with a remainder of 20.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 21 away from 41, we end up with 20.
Grab the next digit (5) from the dividend, add it to 20, then carry on: 205 / 21

Let's proceed to step 3:
If we divide 205 by 21, we get 9 and a remainder of 16.
Put 9 as the next digit of the answer. 
Result so far: 19.0
If we subtract 189 from 205, we get 16.
Take the next digit (4) from the dividend and append it to 16, then repeat: 164 / 21

On to step 4:
164 divided by 21 is 7 with a remainder of 17.
The next digit of our result is 7. 
Result so far: 197.0
Deduct 147 from 164 and we're left with 17.
Grab the next digit (0) from the dividend, add it to 17, then carry on: 170 / 21

Moving on to step 5:
21 goes into 170 8 times with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 1978.0
The remainder is 2 after subtracting 168 from 170.
Include the next digit (2) from the dividend after 2, then repeat: 22 / 21

Step 6:
22 divided by 21 is 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 19781.0
Deduct 21 from 22 and we're left with 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 21

Moving on to step 7:
21 can be fit into 11 0 times, resulting in a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 197810.0
The remainder is 11 after subtracting 0 from 11.
Include the next digit (7) from the dividend after 11, then repeat: 117 / 21

On to step 8:
21 can be fit into 117 5 times, resulting in a remainder of 12.
The next digit of our result is 5. 
Result so far: 1978105.0
If we take 105 away from 117, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 9:
If we divide 120 by 21, we get 5 and a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 1978105.5
Subtracting 105 from 120 leaves us 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.

On to step 10:
21 can be fit into 150 7 times, resulting in a remainder of 3.
The next digit of our result is 7. 
Result so far: 1978105.57
If we subtract 147 from 150, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 11:
The number 21 fits into 30 1 times, leaving a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 1978105.571
Subtracting 21 from 30 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 12:
The number 21 fits into 90 4 times, leaving a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 1978105.5714
Deduct 84 from 90 and we're left 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.

Step 13:
21 can be fit into 60 2 times, resulting in a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 1978105.57142
The remainder is 18 after subtracting 42 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 14:
180 divided by 21 is 8 with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 1978105.571428
Subtracting 168 from 180 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 15:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 1978105.5714285
Subtract 105 from 120 to 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.

Going ahead to step 16:
If we divide 150 by 21, we get 7 and a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 1978105.57142857
Subtracting 147 from 150 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final outcome is 1978105.57142857, with a leftover of 3e-09.