21857897 ÷ 547 
We want to figure out the number of times 21857897 can be divided by 547.

On to step 1:
If we divide 2 by 547, we get 0 and 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.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 547

Moving on to step 2:
When dividing 21 by 547, we get 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Append the next digit (8) from the dividend to 21 and continue with: 218 / 547

Let's proceed to step 3:
218 divided by 547 is 0 with a remainder of 218.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 218 to get 218.
Fetch the next digit (5) from the dividend, attach it to 218 and continue: 2185 / 547

Advancing to step 4:
547 can be fit into 2185 3 times, resulting in a remainder of 544.
Put 3 as the next digit of the answer. 
Result so far: 3.0
The remainder is 544 after subtracting 1641 from 2185.
Grab the next digit (7) from the dividend, add it to 544, then carry on: 5447 / 547

Let's proceed to step 5:
5447 divided by 547 is 9 with a remainder of 524.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
If we subtract 4923 from 5447, we get 524.
Grab the next digit (8) from the dividend, add it to 524, then carry on: 5248 / 547

Going ahead to step 6:
If we divide 5248 by 547, we get 9 and a remainder of 325.
Use 9 as the next digit of our solution. 
Result so far: 399.0
The remainder is 325 after subtracting 4923 from 5248.
Grab the next digit (9) from the dividend, add it to 325, then carry on: 3259 / 547

On to step 7:
When dividing 3259 by 547, we get 5 with a remainder of 524.
The number 5 becomes the next digit in our result. 
Result so far: 3995.0
The remainder is 524 after subtracting 2735 from 3259.
Fetch the next digit (7) from the dividend, attach it to 524 and continue: 5247 / 547

Step 8:
The number 547 fits into 5247 9 times, leaving a remainder of 324.
Put 9 as the next digit of the answer. 
Result so far: 39959.0
Subtracting 4923 from 5247 leaves us with 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Advancing to step 9:
547 can be fit into 3240 5 times, resulting in a remainder of 505.
Write down 5 as next digit of the result. 
Result so far: 39959.5
Subtract 2735 from 3240 to get 505.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5050, and continue the process.

Advancing to step 10:
547 goes into 5050 9 times with a remainder of 127.
The number 9 becomes the next digit in our result. 
Result so far: 39959.59
Deduct 4923 from 5050 and we're left with 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

Moving on to step 11:
If we divide 1270 by 547, we get 2 and a remainder of 176.
Write down 2 as next digit of the result. 
Result so far: 39959.592
The remainder is 176 after subtracting 1094 from 1270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

On to step 12:
547 goes into 1760 3 times with a remainder of 119.
The number 3 becomes the next digit in our result. 
Result so far: 39959.5923
The remainder is 119 after subtracting 1641 from 1760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

On to step 13:
547 goes into 1190 2 times with a remainder of 96.
Record the quotient 2 as the next digit in the result. 
Result so far: 39959.59232
The remainder is 96 after subtracting 1094 from 1190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 14:
960 divided by 547 is 1 with a remainder of 413.
Write down 1 as next digit of the result. 
Result so far: 39959.592321
Subtract 547 from 960 to get 413.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4130, and continue the process.

Let's proceed to step 15:
4130 divided by 547 is 7 with a remainder of 301.
Put 7 as the next digit of the answer. 
Result so far: 39959.5923217
If we take 3829 away from 4130, we end up with 301.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

Let's proceed to step 16:
3010 divided by 547 is 5 with a remainder of 275.
Use 5 as the next digit of our solution. 
Result so far: 39959.59232175
Subtracting 2735 from 3010 leaves us with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

The final result is 39959.59232175 with a remainder of 2.75e-07.