We look at the division of 21931919 by 408 
Let's see how many times 408 fits into 21931919.

Let's proceed to step 1:
If we divide 2 by 408, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 408

Moving on to step 2:
The number 408 fits into 21 0 times, leaving a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Append the next digit (9) from the dividend to 21 and continue with: 219 / 408

Step 3:
219 divided by 408 is 0 with a remainder of 219.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 219 to get 219.
Grab the next digit (3) from the dividend, add it to 219, then carry on: 2193 / 408

Moving on to step 4:
2193 divided by 408 is 5 with a remainder of 153.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 2040 from 2193 to get 153.
Append the next digit (1) from the dividend to 153 and continue with: 1531 / 408

Advancing to step 5:
1531 divided by 408 is 3 with a remainder of 307.
Put 3 as the next digit of the answer. 
Result so far: 53.0
Subtract 1224 from 1531 to get 307.
Take the next digit (9) from the dividend and append it to 307, then repeat: 3079 / 408

On to step 6:
3079 divided by 408 is 7 with a remainder of 223.
Record the quotient 7 as the next digit in the result. 
Result so far: 537.0
Subtract 2856 from 3079 to get 223.
Append the next digit (1) from the dividend to 223 and continue with: 2231 / 408

Moving on to step 7:
If we divide 2231 by 408, we get 5 and a remainder of 191.
The next digit of our result is 5. 
Result so far: 5375.0
If we take 2040 away from 2231, we end up with 191.
Append the next digit (9) from the dividend to 191 and continue with: 1919 / 408

On to step 8:
When dividing 1919 by 408, we get 4 with a remainder of 287.
The next digit of our result is 4. 
Result so far: 53754.0
Deduct 1632 from 1919 and we're left with 287.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2870, and continue the process.

Moving on to step 9:
When dividing 2870 by 408, we get 7 with a remainder of 14.
Write down 7 as next digit of the result. 
Result so far: 53754.7
If we subtract 2856 from 2870, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 10:
If we divide 140 by 408, we get 0 and a remainder of 140.
Record the quotient 0 as the next digit in the result. 
Result so far: 53754.7
If we take 0 away from 140, we end up with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Let's proceed to step 11:
If we divide 1400 by 408, we get 3 and a remainder of 176.
Use 3 as the next digit of our solution. 
Result so far: 53754.703
Subtract 1224 from 1400 to get 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Going ahead to step 12:
The number 408 fits into 1760 4 times, leaving a remainder of 128.
Use 4 as the next digit of our solution. 
Result so far: 53754.7034
The remainder is 128 after subtracting 1632 from 1760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 13:
408 goes into 1280 3 times with a remainder of 56.
The next digit of our result is 3. 
Result so far: 53754.70343
Deduct 1224 from 1280 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 14:
If we divide 560 by 408, we get 1 and a remainder of 152.
Use 1 as the next digit of our solution. 
Result so far: 53754.703431
If we subtract 408 from 560, we get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Advancing to step 15:
1520 divided by 408 is 3 with a remainder of 296.
Write down 3 as next digit of the result. 
Result so far: 53754.7034313
Subtract 1224 from 1520 to get 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Step 16:
The number 408 fits into 2960 7 times, leaving a remainder of 104.
Record the quotient 7 as the next digit in the result. 
Result so far: 53754.70343137
Subtracting 2856 from 2960 leaves us with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

The final outcome is 53754.70343137, with a leftover of 1.04e-07.