21434555 ÷ 807 
We're looking to find how many times 807 goes into 21434555.

Going ahead to step 1:
When dividing 2 by 807, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 807

Moving on to step 2:
If we divide 21 by 807, we get 0 and a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Take the next digit (4) from the dividend and append it to 21, then repeat: 214 / 807

Going ahead to step 3:
When dividing 214 by 807, we get 0 with a remainder of 214.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 214 to get 214.
Append the next digit (3) from the dividend to 214 and continue with: 2143 / 807

Moving on to step 4:
2143 divided by 807 is 2 with a remainder of 529.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 1614 away from 2143, we end up with 529.
Take the next digit (4) from the dividend and append it to 529, then repeat: 5294 / 807

Going ahead to step 5:
When dividing 5294 by 807, we get 6 with a remainder of 452.
The number 6 becomes the next digit in our result. 
Result so far: 26.0
The remainder is 452 after subtracting 4842 from 5294.
Bring next digit (5) of the dividend behind the 452 and repeat the process: 4525 / 807

On to step 6:
807 goes into 4525 5 times with a remainder of 490.
Record the quotient 5 as the next digit in the result. 
Result so far: 265.0
Deduct 4035 from 4525 and we're left with 490.
Take the next digit (5) from the dividend and append it to 490, then repeat: 4905 / 807

On to step 7:
807 can be fit into 4905 6 times, resulting in a remainder of 63.
Use 6 as the next digit of our solution. 
Result so far: 2656.0
Deduct 4842 from 4905 and we're left with 63.
Take the next digit (5) from the dividend and append it to 63, then repeat: 635 / 807

Advancing to step 8:
635 divided by 807 is 0 with a remainder of 635.
Use 0 as the next digit of our solution. 
Result so far: 26560.0
Subtract 0 from 635 to get 635.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6350, and continue the process.

Advancing to step 9:
807 goes into 6350 7 times with a remainder of 701.
Write down 7 as next digit of the result. 
Result so far: 26560.7
If we take 5649 away from 6350, we end up with 701.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7010, and continue the process.

Advancing to step 10:
807 goes into 7010 8 times with a remainder of 554.
Record the quotient 8 as the next digit in the result. 
Result so far: 26560.78
If we take 6456 away from 7010, we end up with 554.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5540, and continue the process.

Advancing to step 11:
If we divide 5540 by 807, we get 6 and a remainder of 698.
The next digit of our result is 6. 
Result so far: 26560.786
Subtracting 4842 from 5540 leaves us with 698.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6980, and continue the process.

On to step 12:
6980 divided by 807 is 8 with a remainder of 524.
The number 8 becomes the next digit in our result. 
Result so far: 26560.7868
The remainder is 524 after subtracting 6456 from 6980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5240, and continue the process.

Moving on to step 13:
5240 divided by 807 is 6 with a remainder of 398.
The number 6 becomes the next digit in our result. 
Result so far: 26560.78686
Deduct 4842 from 5240 and we're left with 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Advancing to step 14:
If we divide 3980 by 807, we get 4 and a remainder of 752.
The number 4 becomes the next digit in our result. 
Result so far: 26560.786864
Deduct 3228 from 3980 and we're left with 752.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7520, and continue the process.

Going ahead to step 15:
807 goes into 7520 9 times with a remainder of 257.
Record the quotient 9 as the next digit in the result. 
Result so far: 26560.7868649
If we take 7263 away from 7520, we end up with 257.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2570, and continue the process.

Step 16:
If we divide 2570 by 807, we get 3 and a remainder of 149.
Record the quotient 3 as the next digit in the result. 
Result so far: 26560.78686493
If we take 2421 away from 2570, we end up with 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

The final result is 26560.78686493 with a remainder of 1.49e-07.