68391353 ÷ 507 
We want to figure out the number of times 68391353 can be divided by 507.

On to step 1:
If we divide 6 by 507, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 507

Going ahead to step 2:
The number 507 fits into 68 0 times, leaving 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.
Include the next digit (3) from the dividend after 68, then repeat: 683 / 507

On to step 3:
When dividing 683 by 507, we get 1 with a remainder of 176.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 507 from 683 and we're left with 176.
Bring next digit (9) of the dividend behind the 176 and repeat the process: 1769 / 507

Going ahead to step 4:
When dividing 1769 by 507, we get 3 with a remainder of 248.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we take 1521 away from 1769, we end up with 248.
Append the next digit (1) from the dividend to 248 and continue with: 2481 / 507

Moving on to step 5:
If we divide 2481 by 507, we get 4 and a remainder of 453.
The number 4 becomes the next digit in our result. 
Result so far: 134.0
Subtract 2028 from 2481 to get 453.
Append the next digit (3) from the dividend to 453 and continue with: 4533 / 507

Going ahead to step 6:
If we divide 4533 by 507, we get 8 and a remainder of 477.
Write down 8 as next digit of the result. 
Result so far: 1348.0
The remainder is 477 after subtracting 4056 from 4533.
Grab the next digit (5) from the dividend, add it to 477, then carry on: 4775 / 507

On to step 7:
When dividing 4775 by 507, we get 9 with a remainder of 212.
The next digit of our result is 9. 
Result so far: 13489.0
The remainder is 212 after subtracting 4563 from 4775.
Include the next digit (3) from the dividend after 212, then repeat: 2123 / 507

Going ahead to step 8:
If we divide 2123 by 507, we get 4 and a remainder of 95.
Record the quotient 4 as the next digit in the result. 
Result so far: 134894.0
The remainder is 95 after subtracting 2028 from 2123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Step 9:
950 divided by 507 is 1 with a remainder of 443.
Use 1 as the next digit of our solution. 
Result so far: 134894.1
Subtracting 507 from 950 leaves us with 443.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4430, and continue the process.

Let's proceed to step 10:
507 goes into 4430 8 times with a remainder of 374.
The number 8 becomes the next digit in our result. 
Result so far: 134894.18
Subtracting 4056 from 4430 leaves us with 374.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3740, and continue the process.

Let's proceed to step 11:
507 can be fit into 3740 7 times, resulting in a remainder of 191.
Write down 7 as next digit of the result. 
Result so far: 134894.187
Subtract 3549 from 3740 to get 191.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

Moving on to step 12:
507 can be fit into 1910 3 times, resulting in a remainder of 389.
The next digit of our result is 3. 
Result so far: 134894.1873
Subtract 1521 from 1910 to get 389.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

Advancing to step 13:
507 goes into 3890 7 times with a remainder of 341.
The number 7 becomes the next digit in our result. 
Result so far: 134894.18737
Subtracting 3549 from 3890 leaves us with 341.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3410, and continue the process.

Step 14:
When dividing 3410 by 507, we get 6 with a remainder of 368.
The number 6 becomes the next digit in our result. 
Result so far: 134894.187376
The remainder is 368 after subtracting 3042 from 3410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Advancing to step 15:
If we divide 3680 by 507, we get 7 and a remainder of 131.
The next digit of our result is 7. 
Result so far: 134894.1873767
Subtracting 3549 from 3680 leaves us with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Going ahead to step 16:
507 goes into 1310 2 times with a remainder of 296.
Write down 2 as next digit of the result. 
Result so far: 134894.18737672
Subtracting 1014 from 1310 leaves us with 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

After the division, we end up with 134894.18737672 and a remainder of 2.96e-07.