21064123 ÷ 427 
Let's see how many times 427 fits into 21064123.

Let's proceed to step 1:
427 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 427

Step 2:
When dividing 21 by 427, we get 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Include the next digit (0) from the dividend after 21, then repeat: 210 / 427

On to step 3:
210 divided by 427 is 0 with a remainder of 210.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 210 leaves us with 210.
Include the next digit (6) from the dividend after 210, then repeat: 2106 / 427

Advancing to step 4:
427 goes into 2106 4 times with a remainder of 398.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 1708 from 2106 and we're left with 398.
Grab the next digit (4) from the dividend, add it to 398, then carry on: 3984 / 427

On to step 5:
If we divide 3984 by 427, we get 9 and a remainder of 141.
The next digit of our result is 9. 
Result so far: 49.0
Subtracting 3843 from 3984 leaves us with 141.
Take the next digit (1) from the dividend and append it to 141, then repeat: 1411 / 427

Advancing to step 6:
1411 divided by 427 is 3 with a remainder of 130.
Use 3 as the next digit of our solution. 
Result so far: 493.0
The remainder is 130 after subtracting 1281 from 1411.
Fetch the next digit (2) from the dividend, attach it to 130 and continue: 1302 / 427

Moving on to step 7:
The number 427 fits into 1302 3 times, leaving a remainder of 21.
Record the quotient 3 as the next digit in the result. 
Result so far: 4933.0
Subtracting 1281 from 1302 leaves us with 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 427

Step 8:
427 can be fit into 213 0 times, resulting in a remainder of 213.
Write down 0 as next digit of the result. 
Result so far: 49330.0
Deduct 0 from 213 and we're left with 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

On to step 9:
When dividing 2130 by 427, we get 4 with a remainder of 422.
Use 4 as the next digit of our solution. 
Result so far: 49330.4
The remainder is 422 after subtracting 1708 from 2130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4220, and continue the process.

Going ahead to step 10:
427 goes into 4220 9 times with a remainder of 377.
Record the quotient 9 as the next digit in the result. 
Result so far: 49330.49
Subtract 3843 from 4220 to get 377.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3770, and continue the process.

Moving on to step 11:
When dividing 3770 by 427, we get 8 with a remainder of 354.
Put 8 as the next digit of the answer. 
Result so far: 49330.498
Deduct 3416 from 3770 and we're left with 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Step 12:
If we divide 3540 by 427, we get 8 and a remainder of 124.
Record the quotient 8 as the next digit in the result. 
Result so far: 49330.4988
If we subtract 3416 from 3540, we get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

The final outcome is 49330.4988, with a leftover of 0.00124.