We look at the division of 21163862 by 397 
We're looking to find how many times 397 goes into 21163862.

Let's proceed to step 1:
397 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 397

On to step 2:
21 divided by 397 is 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Take the next digit (1) from the dividend and append it to 21, then repeat: 211 / 397

Going ahead to step 3:
The number 397 fits into 211 0 times, leaving a remainder of 211.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 211, we end up with 211.
Include the next digit (6) from the dividend after 211, then repeat: 2116 / 397

Step 4:
397 can be fit into 2116 5 times, resulting in a remainder of 131.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtracting 1985 from 2116 leaves us with 131.
Fetch the next digit (3) from the dividend, attach it to 131 and continue: 1313 / 397

Advancing to step 5:
397 can be fit into 1313 3 times, resulting in a remainder of 122.
Put 3 as the next digit of the answer. 
Result so far: 53.0
Subtracting 1191 from 1313 leaves us with 122.
Take the next digit (8) from the dividend and append it to 122, then repeat: 1228 / 397

Step 6:
1228 divided by 397 is 3 with a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 533.0
Deduct 1191 from 1228 and we're left with 37.
Append the next digit (6) from the dividend to 37 and continue with: 376 / 397

Step 7:
397 can be fit into 376 0 times, resulting in a remainder of 376.
Write down 0 as next digit of the result. 
Result so far: 5330.0
Subtracting 0 from 376 leaves us with 376.
Fetch the next digit (2) from the dividend, attach it to 376 and continue: 3762 / 397

Going ahead to step 8:
3762 divided by 397 is 9 with a remainder of 189.
Write down 9 as next digit of the result. 
Result so far: 53309.0
If we subtract 3573 from 3762, we get 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

Let's proceed to step 9:
When dividing 1890 by 397, we get 4 with a remainder of 302.
The number 4 becomes the next digit in our result. 
Result so far: 53309.4
Subtracting 1588 from 1890 leaves us with 302.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

Advancing to step 10:
The number 397 fits into 3020 7 times, leaving a remainder of 241.
Record the quotient 7 as the next digit in the result. 
Result so far: 53309.47
Subtracting 2779 from 3020 leaves us with 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

Step 11:
When dividing 2410 by 397, we get 6 with a remainder of 28.
Write down 6 as next digit of the result. 
Result so far: 53309.476
Subtracting 2382 from 2410 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 12:
397 can be fit into 280 0 times, resulting in a remainder of 280.
Record the quotient 0 as the next digit in the result. 
Result so far: 53309.476
If we subtract 0 from 280, we get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Step 13:
397 can be fit into 2800 7 times, resulting in a remainder of 21.
Put 7 as the next digit of the answer. 
Result so far: 53309.47607
The remainder is 21 after subtracting 2779 from 2800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 14:
397 can be fit into 210 0 times, resulting in a remainder of 210.
Write down 0 as next digit of the result. 
Result so far: 53309.47607
Subtracting 0 from 210 leaves us with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

On to step 15:
When dividing 2100 by 397, we get 5 with a remainder of 115.
The next digit of our result is 5. 
Result so far: 53309.4760705
Deduct 1985 from 2100 and we're left with 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Step 16:
1150 divided by 397 is 2 with a remainder of 356.
Put 2 as the next digit of the answer. 
Result so far: 53309.47607052
Subtract 794 from 1150 to get 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

After the division, we end up with 53309.47607052 and a remainder of 3.56e-07.