We're dividing 68687451 by 512 
Let's see how many times 512 fits into 68687451.

Moving on to step 1:
The number 512 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 512

Let's proceed to step 2:
When dividing 68 by 512, we get 0 with a remainder of 68.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 68 leaves us with 68.
Bring next digit (6) of the dividend behind the 68 and repeat the process: 686 / 512

On to step 3:
The number 512 fits into 686 1 times, leaving a remainder of 174.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 174 after subtracting 512 from 686.
Bring next digit (8) of the dividend behind the 174 and repeat the process: 1748 / 512

Going ahead to step 4:
512 goes into 1748 3 times with a remainder of 212.
Put 3 as the next digit of the answer. 
Result so far: 13.0
If we take 1536 away from 1748, we end up with 212.
Append the next digit (7) from the dividend to 212 and continue with: 2127 / 512

Going ahead to step 5:
When dividing 2127 by 512, we get 4 with a remainder of 79.
The number 4 becomes the next digit in our result. 
Result so far: 134.0
Deduct 2048 from 2127 and we're left with 79.
Grab the next digit (4) from the dividend, add it to 79, then carry on: 794 / 512

Let's proceed to step 6:
794 divided by 512 is 1 with a remainder of 282.
Put 1 as the next digit of the answer. 
Result so far: 1341.0
Subtract 512 from 794 to get 282.
Fetch the next digit (5) from the dividend, attach it to 282 and continue: 2825 / 512

Let's proceed to step 7:
512 goes into 2825 5 times with a remainder of 265.
Write down 5 as next digit of the result. 
Result so far: 13415.0
Subtracting 2560 from 2825 leaves us with 265.
Append the next digit (1) from the dividend to 265 and continue with: 2651 / 512

Step 8:
The number 512 fits into 2651 5 times, leaving a remainder of 91.
Put 5 as the next digit of the answer. 
Result so far: 134155.0
If we subtract 2560 from 2651, we get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Advancing to step 9:
If we divide 910 by 512, we get 1 and a remainder of 398.
The next digit of our result is 1. 
Result so far: 134155.1
If we subtract 512 from 910, we get 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Moving on to step 10:
512 can be fit into 3980 7 times, resulting in a remainder of 396.
Put 7 as the next digit of the answer. 
Result so far: 134155.17
The remainder is 396 after subtracting 3584 from 3980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Advancing to step 11:
3960 divided by 512 is 7 with a remainder of 376.
The number 7 becomes the next digit in our result. 
Result so far: 134155.177
Deduct 3584 from 3960 and we're left with 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

The final outcome is 134155.177, with a leftover of 0.0376.