512151 ÷ 69 
We want to figure out the number of times 512151 can be divided by 69.

Moving on to step 1:
69 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 69

Moving on to step 2:
69 can be fit into 51 0 times, resulting in a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Append the next digit (2) from the dividend to 51 and continue with: 512 / 69

Going ahead to step 3:
69 can be fit into 512 7 times, resulting in a remainder of 29.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we take 483 away from 512, we end up with 29.
Append the next digit (1) from the dividend to 29 and continue with: 291 / 69

On to step 4:
69 can be fit into 291 4 times, resulting in a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 74.0
The remainder is 15 after subtracting 276 from 291.
Take the next digit (5) from the dividend and append it to 15, then repeat: 155 / 69

Going ahead to step 5:
If we divide 155 by 69, we get 2 and a remainder of 17.
Write down 2 as next digit of the result. 
Result so far: 742.0
The remainder is 17 after subtracting 138 from 155.
Fetch the next digit (1) from the dividend, attach it to 17 and continue: 171 / 69

Step 6:
The number 69 fits into 171 2 times, leaving a remainder of 33.
Record the quotient 2 as the next digit in the result. 
Result so far: 7422.0
If we subtract 138 from 171, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 7:
69 goes into 330 4 times with a remainder of 54.
Write down 4 as next digit of the result. 
Result so far: 7422.4
If we take 276 away from 330, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 8:
The number 69 fits into 540 7 times, leaving a remainder of 57.
The number 7 becomes the next digit in our result. 
Result so far: 7422.47
Subtract 483 from 540 to get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Let's proceed to step 9:
69 can be fit into 570 8 times, resulting in a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 7422.478
Subtracting 552 from 570 leaves us with 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 10:
69 goes into 180 2 times with a remainder of 42.
The number 2 becomes the next digit in our result. 
Result so far: 7422.4782
Deduct 138 from 180 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 11:
The number 69 fits into 420 6 times, leaving a remainder of 6.
The next digit of our result is 6. 
Result so far: 7422.47826
Subtracting 414 from 420 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 12:
When dividing 60 by 69, we get 0 with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 7422.47826
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 13:
The number 69 fits into 600 8 times, leaving a remainder of 48.
Use 8 as the next digit of our solution. 
Result so far: 7422.4782608
Subtract 552 from 600 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 14:
69 can be fit into 480 6 times, resulting in a remainder of 66.
Use 6 as the next digit of our solution. 
Result so far: 7422.47826086
Deduct 414 from 480 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

The final outcome is 7422.47826086, with a leftover of 6.6e-08.