Let's divide 21395841 by 408
We want to divide 21395841 by 408.

Going ahead to step 1:
When dividing 2 by 408, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 408

Let's proceed to step 2:
The number 408 fits into 21 0 times, leaving a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 408

Going ahead to step 3:
When dividing 213 by 408, we get 0 with a remainder of 213.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 213 and we're left with 213.
Grab the next digit (9) from the dividend, add it to 213, then carry on: 2139 / 408

Going ahead to step 4:
408 goes into 2139 5 times with a remainder of 99.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Deduct 2040 from 2139 and we're left with 99.
Bring next digit (5) of the dividend behind the 99 and repeat the process: 995 / 408

Let's proceed to step 5:
408 goes into 995 2 times with a remainder of 179.
The next digit of our result is 2. 
Result so far: 52.0
Subtract 816 from 995 to get 179.
Grab the next digit (8) from the dividend, add it to 179, then carry on: 1798 / 408

Let's proceed to step 6:
If we divide 1798 by 408, we get 4 and a remainder of 166.
Record the quotient 4 as the next digit in the result. 
Result so far: 524.0
If we subtract 1632 from 1798, we get 166.
Fetch the next digit (4) from the dividend, attach it to 166 and continue: 1664 / 408

Step 7:
1664 divided by 408 is 4 with a remainder of 32.
Record the quotient 4 as the next digit in the result. 
Result so far: 5244.0
If we subtract 1632 from 1664, we get 32.
Fetch the next digit (1) from the dividend, attach it to 32 and continue: 321 / 408

Advancing to step 8:
408 goes into 321 0 times with a remainder of 321.
The next digit of our result is 0. 
Result so far: 52440.0
If we subtract 0 from 321, we get 321.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3210, and continue the process.

Advancing to step 9:
If we divide 3210 by 408, we get 7 and a remainder of 354.
Write down 7 as next digit of the result. 
Result so far: 52440.7
Subtracting 2856 from 3210 leaves us with 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Moving on to step 10:
408 goes into 3540 8 times with a remainder of 276.
Record the quotient 8 as the next digit in the result. 
Result so far: 52440.78
The remainder is 276 after subtracting 3264 from 3540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Going ahead to step 11:
408 can be fit into 2760 6 times, resulting in a remainder of 312.
Use 6 as the next digit of our solution. 
Result so far: 52440.786
Subtracting 2448 from 2760 leaves us with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

On to step 12:
The number 408 fits into 3120 7 times, leaving a remainder of 264.
Use 7 as the next digit of our solution. 
Result so far: 52440.7867
Deduct 2856 from 3120 and we're left with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Let's proceed to step 13:
If we divide 2640 by 408, we get 6 and a remainder of 192.
Use 6 as the next digit of our solution. 
Result so far: 52440.78676
Deduct 2448 from 2640 and we're left with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Going ahead to step 14:
The number 408 fits into 1920 4 times, leaving a remainder of 288.
Write down 4 as next digit of the result. 
Result so far: 52440.786764
If we take 1632 away from 1920, we end up with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Advancing to step 15:
2880 divided by 408 is 7 with a remainder of 24.
Use 7 as the next digit of our solution. 
Result so far: 52440.7867647
Subtracting 2856 from 2880 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 16:
408 can be fit into 240 0 times, resulting in a remainder of 240.
Use 0 as the next digit of our solution. 
Result so far: 52440.7867647
If we subtract 0 from 240, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Our division results in 52440.7867647 with a remaining 2.4e-07.