21020434 ÷ 239 
Our goal is to divide 21020434 by 239.

Advancing to step 1:
239 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 239

Let's proceed to step 2:
The number 239 fits into 21 0 times, leaving a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Take the next digit (0) from the dividend and append it to 21, then repeat: 210 / 239

Let's proceed to step 3:
239 can be fit into 210 0 times, resulting in a remainder of 210.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 210 leaves us with 210.
Take the next digit (2) from the dividend and append it to 210, then repeat: 2102 / 239

On to step 4:
239 can be fit into 2102 8 times, resulting in a remainder of 190.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtract 1912 from 2102 to get 190.
Bring next digit (0) of the dividend behind the 190 and repeat the process: 1900 / 239

On to step 5:
239 can be fit into 1900 7 times, resulting in a remainder of 227.
Write down 7 as next digit of the result. 
Result so far: 87.0
If we subtract 1673 from 1900, we get 227.
Take the next digit (4) from the dividend and append it to 227, then repeat: 2274 / 239

Step 6:
239 can be fit into 2274 9 times, resulting in a remainder of 123.
Write down 9 as next digit of the result. 
Result so far: 879.0
If we subtract 2151 from 2274, we get 123.
Include the next digit (3) from the dividend after 123, then repeat: 1233 / 239

Let's proceed to step 7:
The number 239 fits into 1233 5 times, leaving a remainder of 38.
The next digit of our result is 5. 
Result so far: 8795.0
The remainder is 38 after subtracting 1195 from 1233.
Bring next digit (4) of the dividend behind the 38 and repeat the process: 384 / 239

Let's proceed to step 8:
When dividing 384 by 239, we get 1 with a remainder of 145.
Put 1 as the next digit of the answer. 
Result so far: 87951.0
If we take 239 away from 384, we end up with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Step 9:
If we divide 1450 by 239, we get 6 and a remainder of 16.
Record the quotient 6 as the next digit in the result. 
Result so far: 87951.6
Deduct 1434 from 1450 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.

Advancing to step 10:
If we divide 160 by 239, we get 0 and a remainder of 160.
Put 0 as the next digit of the answer. 
Result so far: 87951.6
Subtract 0 from 160 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 11:
1600 divided by 239 is 6 with a remainder of 166.
Write down 6 as next digit of the result. 
Result so far: 87951.606
If we subtract 1434 from 1600, we get 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Advancing to step 12:
1660 divided by 239 is 6 with a remainder of 226.
Record the quotient 6 as the next digit in the result. 
Result so far: 87951.6066
If we subtract 1434 from 1660, we get 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

After the division, we end up with 87951.6066 and a remainder of 0.00226.