68859243 ÷ 510 
We're looking to find how many times 510 goes into 68859243.

Step 1:
510 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 510

Going ahead to step 2:
510 goes into 68 0 times with a remainder of 68.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 68 to get 68.
Append the next digit (8) from the dividend to 68 and continue with: 688 / 510

Step 3:
When dividing 688 by 510, we get 1 with a remainder of 178.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 510 from 688 leaves us with 178.
Grab the next digit (5) from the dividend, add it to 178, then carry on: 1785 / 510

Going ahead to step 4:
510 goes into 1785 3 times with a remainder of 255.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we subtract 1530 from 1785, we get 255.
Grab the next digit (9) from the dividend, add it to 255, then carry on: 2559 / 510

Going ahead to step 5:
When dividing 2559 by 510, we get 5 with a remainder of 9.
The next digit of our result is 5. 
Result so far: 135.0
If we take 2550 away from 2559, we end up with 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 510

On to step 6:
When dividing 92 by 510, we get 0 with a remainder of 92.
The next digit of our result is 0. 
Result so far: 1350.0
If we subtract 0 from 92, we get 92.
Take the next digit (4) from the dividend and append it to 92, then repeat: 924 / 510

Going ahead to step 7:
510 can be fit into 924 1 times, resulting in a remainder of 414.
The number 1 becomes the next digit in our result. 
Result so far: 13501.0
Subtract 510 from 924 to get 414.
Bring next digit (3) of the dividend behind the 414 and repeat the process: 4143 / 510

Step 8:
4143 divided by 510 is 8 with a remainder of 63.
Use 8 as the next digit of our solution. 
Result so far: 135018.0
The remainder is 63 after subtracting 4080 from 4143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Advancing to step 9:
The number 510 fits into 630 1 times, leaving a remainder of 120.
The number 1 becomes the next digit in our result. 
Result so far: 135018.1
Subtract 510 from 630 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 10:
510 goes into 1200 2 times with a remainder of 180.
Use 2 as the next digit of our solution. 
Result so far: 135018.12
Deduct 1020 from 1200 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 11:
When dividing 1800 by 510, we get 3 with a remainder of 270.
Write down 3 as next digit of the result. 
Result so far: 135018.123
Subtracting 1530 from 1800 leaves us with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Going ahead to step 12:
510 can be fit into 2700 5 times, resulting in a remainder of 150.
Write down 5 as next digit of the result. 
Result so far: 135018.1235
If we subtract 2550 from 2700, we get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Moving on to step 13:
1500 divided by 510 is 2 with a remainder of 480.
Use 2 as the next digit of our solution. 
Result so far: 135018.12352
The remainder is 480 after subtracting 1020 from 1500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Advancing to step 14:
The number 510 fits into 4800 9 times, leaving a remainder of 210.
Use 9 as the next digit of our solution. 
Result so far: 135018.123529
The remainder is 210 after subtracting 4590 from 4800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 15:
510 can be fit into 2100 4 times, resulting in a remainder of 60.
The next digit of our result is 4. 
Result so far: 135018.1235294
Subtract 2040 from 2100 to get 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 16:
The number 510 fits into 600 1 times, leaving a remainder of 90.
Use 1 as the next digit of our solution. 
Result so far: 135018.12352941
Deduct 510 from 600 and we're left with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

The final outcome is 135018.12352941, with a leftover of 9e-08.