71852002 ÷ 21 
We want to divide 71852002 by 21.

On to step 1:
21 can be fit into 7 0 times, resulting in a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 21

Advancing to step 2:
When dividing 71 by 21, we get 3 with a remainder of 8.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 63 from 71 to get 8.
Grab the next digit (8) from the dividend, add it to 8, then carry on: 88 / 21

Step 3:
21 goes into 88 4 times with a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 34.0
Subtracting 84 from 88 leaves us with 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 21

Step 4:
21 goes into 45 2 times with a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 342.0
Subtracting 42 from 45 leaves us with 3.
Take the next digit (2) from the dividend and append it to 3, then repeat: 32 / 21

Going ahead to step 5:
When dividing 32 by 21, we get 1 with a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 3421.0
If we take 21 away from 32, we end up with 11.
Grab the next digit (0) from the dividend, add it to 11, then carry on: 110 / 21

On to step 6:
The number 21 fits into 110 5 times, leaving a remainder of 5.
The next digit of our result is 5. 
Result so far: 34215.0
Deduct 105 from 110 and we're left with 5.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 21

Step 7:
If we divide 50 by 21, we get 2 and a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 342152.0
Subtract 42 from 50 to get 8.
Include the next digit (2) from the dividend after 8, then repeat: 82 / 21

Advancing to step 8:
If we divide 82 by 21, we get 3 and a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 3421523.0
Deduct 63 from 82 and we're left 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.

Going ahead to step 9:
When dividing 190 by 21, we get 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 3421523.9
Subtracting 189 from 190 leaves us 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.

On to step 10:
21 goes into 10 0 times with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 3421523.9
Deduct 0 from 10 and we're left 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.

Advancing to step 11:
21 goes into 100 4 times with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 3421523.904
If we take 84 away from 100, we end up 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.

Advancing to step 12:
When dividing 160 by 21, we get 7 with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 3421523.9047
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 13:
If we divide 130 by 21, we get 6 and a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 3421523.90476
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 14:
If we divide 40 by 21, we get 1 and a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 3421523.904761
Subtract 21 from 40 to get 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 15:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 3421523.9047619
If we take 189 away from 190, we end up 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.

Going ahead to step 16:
21 goes into 10 0 times with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 3421523.9047619
Subtracting 0 from 10 leaves us 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.

After the division, we end up with 3421523.9047619 and a remainder of 1e-08.