We're dividing 21581302 by 434 
Our goal is to divide 21581302 by 434.

Step 1:
When dividing 2 by 434, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 434

Moving on to step 2:
434 goes into 21 0 times with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Include the next digit (5) from the dividend after 21, then repeat: 215 / 434

Going ahead to step 3:
434 goes into 215 0 times with a remainder of 215.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 215, we get 215.
Take the next digit (8) from the dividend and append it to 215, then repeat: 2158 / 434

Let's proceed to step 4:
The number 434 fits into 2158 4 times, leaving a remainder of 422.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 1736 from 2158, we get 422.
Grab the next digit (1) from the dividend, add it to 422, then carry on: 4221 / 434

Advancing to step 5:
If we divide 4221 by 434, we get 9 and a remainder of 315.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
The remainder is 315 after subtracting 3906 from 4221.
Include the next digit (3) from the dividend after 315, then repeat: 3153 / 434

On to step 6:
The number 434 fits into 3153 7 times, leaving a remainder of 115.
Put 7 as the next digit of the answer. 
Result so far: 497.0
Deduct 3038 from 3153 and we're left with 115.
Include the next digit (0) from the dividend after 115, then repeat: 1150 / 434

Let's proceed to step 7:
If we divide 1150 by 434, we get 2 and a remainder of 282.
Record the quotient 2 as the next digit in the result. 
Result so far: 4972.0
The remainder is 282 after subtracting 868 from 1150.
Append the next digit (2) from the dividend to 282 and continue with: 2822 / 434

Moving on to step 8:
When dividing 2822 by 434, we get 6 with a remainder of 218.
Use 6 as the next digit of our solution. 
Result so far: 49726.0
If we subtract 2604 from 2822, we get 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

On to step 9:
434 goes into 2180 5 times with a remainder of 10.
The next digit of our result is 5. 
Result so far: 49726.5
Deduct 2170 from 2180 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.

On to step 10:
100 divided by 434 is 0 with a remainder of 100.
Use 0 as the next digit of our solution. 
Result so far: 49726.5
If we subtract 0 from 100, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 11:
When dividing 1000 by 434, we get 2 with a remainder of 132.
The next digit of our result is 2. 
Result so far: 49726.502
Subtract 868 from 1000 to get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Advancing to step 12:
The number 434 fits into 1320 3 times, leaving a remainder of 18.
Put 3 as the next digit of the answer. 
Result so far: 49726.5023
Subtract 1302 from 1320 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 13:
434 can be fit into 180 0 times, resulting in a remainder of 180.
Put 0 as the next digit of the answer. 
Result so far: 49726.5023
Deduct 0 from 180 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Let's proceed to step 14:
1800 divided by 434 is 4 with a remainder of 64.
Write down 4 as next digit of the result. 
Result so far: 49726.502304
Subtracting 1736 from 1800 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 15:
640 divided by 434 is 1 with a remainder of 206.
Use 1 as the next digit of our solution. 
Result so far: 49726.5023041
If we take 434 away from 640, we end up with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Step 16:
The number 434 fits into 2060 4 times, leaving a remainder of 324.
Record the quotient 4 as the next digit in the result. 
Result so far: 49726.50230414
If we take 1736 away from 2060, we end up 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.

The final outcome is 49726.50230414, with a leftover of 3.24e-07.