85208437 divided by 21 
We want to divide 85208437 by 21.

Going ahead to step 1:
21 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 21

Step 2:
The number 21 fits into 85 4 times, leaving a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 84 away from 85, we end up with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 21

Advancing to step 3:
When dividing 12 by 21, we get 0 with a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 40.0
Subtract 0 from 12 to get 12.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 21

Going ahead to step 4:
21 goes into 120 5 times with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 405.0
Subtract 105 from 120 to get 15.
Include the next digit (8) from the dividend after 15, then repeat: 158 / 21

Let's proceed to step 5:
The number 21 fits into 158 7 times, leaving a remainder of 11.
The next digit of our result is 7. 
Result so far: 4057.0
Subtract 147 from 158 to get 11.
Fetch the next digit (4) from the dividend, attach it to 11 and continue: 114 / 21

On to step 6:
When dividing 114 by 21, we get 5 with a remainder of 9.
Use 5 as the next digit of our solution. 
Result so far: 40575.0
Subtracting 105 from 114 leaves us with 9.
Grab the next digit (3) from the dividend, add it to 9, then carry on: 93 / 21

On to step 7:
When dividing 93 by 21, we get 4 with a remainder of 9.
The next digit of our result is 4. 
Result so far: 405754.0
Subtracting 84 from 93 leaves us with 9.
Grab the next digit (7) from the dividend, add it to 9, then carry on: 97 / 21

Moving on to step 8:
21 can be fit into 97 4 times, resulting in a remainder of 13.
Write down 4 as next digit of the result. 
Result so far: 4057544.0
Deduct 84 from 97 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 9:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 4057544.6
Deduct 126 from 130 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 10:
When dividing 40 by 21, we get 1 with a remainder of 19.
The next digit of our result is 1. 
Result so far: 4057544.61
If we take 21 away from 40, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 11:
21 can be fit into 190 9 times, resulting in a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 4057544.619
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 12:
10 divided by 21 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 4057544.619
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 13:
When dividing 100 by 21, we get 4 with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 4057544.61904
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 14:
21 can be fit into 160 7 times, resulting in a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 4057544.619047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 15:
When dividing 130 by 21, we get 6 with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 4057544.6190476
Subtract 126 from 130 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 16:
When dividing 40 by 21, we get 1 with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 4057544.61904761
Subtracting 21 from 40 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

In conclusion, the division gives 4057544.61904761 with a balance of 1.9e-08.