250429 ÷ 21 
Our goal is to divide 250429 by 21.

Step 1:
The number 21 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 21

Step 2:
When dividing 25 by 21, we get 1 with a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 21 from 25 and we're left with 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 21

Let's proceed to step 3:
If we divide 40 by 21, we get 1 and a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 11.0
The remainder is 19 after subtracting 21 from 40.
Grab the next digit (4) from the dividend, add it to 19, then carry on: 194 / 21

Going ahead to step 4:
21 can be fit into 194 9 times, resulting in a remainder of 5.
Record the quotient 9 as the next digit in the result. 
Result so far: 119.0
If we subtract 189 from 194, we get 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 21

Moving on to step 5:
The number 21 fits into 52 2 times, leaving a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 1192.0
The remainder is 10 after subtracting 42 from 52.
Fetch the next digit (9) from the dividend, attach it to 10 and continue: 109 / 21

Moving on to step 6:
When dividing 109 by 21, we get 5 with a remainder of 4.
Write down 5 as next digit of the result. 
Result so far: 11925.0
If we take 105 away from 109, we end up 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.

Step 7:
When dividing 40 by 21, we get 1 with a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 11925.1
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.

On to step 8:
21 goes into 190 9 times with a remainder of 1.
The next digit of our result is 9. 
Result so far: 11925.19
The remainder is 1 after subtracting 189 from 190.
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 9:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 11925.19
If we subtract 0 from 10, we get 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 10:
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: 11925.1904
If we subtract 84 from 100, we get 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 11:
160 divided by 21 is 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 11925.19047
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 12:
21 can be fit into 130 6 times, resulting in a remainder of 4.
The next digit of our result is 6. 
Result so far: 11925.190476
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.

Advancing to step 13:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 11925.1904761
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.

Moving on to step 14:
190 divided by 21 is 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 11925.19047619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The quotient of the division is 11925.19047619, and the remainder is 1e-09.