We're dividing 34485263 by 21 
We want to figure out the number of times 34485263 can be divided by 21.

Let's proceed to step 1:
21 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 21

Step 2:
34 divided by 21 is 1 with a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 21 from 34 and we're left with 13.
Grab the next digit (4) from the dividend, add it to 13, then carry on: 134 / 21

Advancing to step 3:
The number 21 fits into 134 6 times, leaving a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 16.0
If we subtract 126 from 134, we get 8.
Bring next digit (8) of the dividend behind the 8 and repeat the process: 88 / 21

On to step 4:
21 goes into 88 4 times with a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 164.0
The remainder is 4 after subtracting 84 from 88.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 21

Step 5:
21 can be fit into 45 2 times, resulting in a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 1642.0
The remainder is 3 after subtracting 42 from 45.
Fetch the next digit (2) from the dividend, attach it to 3 and continue: 32 / 21

Advancing to step 6:
32 divided by 21 is 1 with a remainder of 11.
The next digit of our result is 1. 
Result so far: 16421.0
Subtract 21 from 32 to get 11.
Append the next digit (6) from the dividend to 11 and continue with: 116 / 21

Going ahead to step 7:
116 divided by 21 is 5 with a remainder of 11.
Write down 5 as next digit of the result. 
Result so far: 164215.0
Subtracting 105 from 116 leaves us with 11.
Grab the next digit (3) from the dividend, add it to 11, then carry on: 113 / 21

Let's proceed to step 8:
When dividing 113 by 21, we get 5 with a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 1642155.0
The remainder is 8 after subtracting 105 from 113.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 9:
If we divide 80 by 21, we get 3 and a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 1642155.3
If we take 63 away from 80, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 10:
When dividing 170 by 21, we get 8 with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 1642155.38
The remainder is 2 after subtracting 168 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
The number 21 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 1642155.38
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 12:
If we divide 200 by 21, we get 9 and a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 1642155.3809
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 13:
21 goes into 110 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 1642155.38095
Subtracting 105 from 110 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 14:
21 goes into 50 2 times with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 1642155.380952
If we subtract 42 from 50, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 15:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 1642155.3809523
The remainder is 17 after subtracting 63 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 16:
21 can be fit into 170 8 times, resulting in a remainder of 2.
The next digit of our result is 8. 
Result so far: 1642155.38095238
If we subtract 168 from 170, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 1642155.38095238 with a remainder of 2e-09.