68315715 ÷ 80 
Our goal is to divide 68315715 by 80.

On to step 1:
80 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
Subtracting 0 from 6 leaves us with 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 80

Moving on to step 2:
80 can be fit into 68 0 times, resulting in a remainder of 68.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 68 to get 68.
Append the next digit (3) from the dividend to 68 and continue with: 683 / 80

On to step 3:
When dividing 683 by 80, we get 8 with a remainder of 43.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we take 640 away from 683, we end up with 43.
Bring next digit (1) of the dividend behind the 43 and repeat the process: 431 / 80

Step 4:
When dividing 431 by 80, we get 5 with a remainder of 31.
Record the quotient 5 as the next digit in the result. 
Result so far: 85.0
If we take 400 away from 431, we end up with 31.
Bring next digit (5) of the dividend behind the 31 and repeat the process: 315 / 80

Going ahead to step 5:
If we divide 315 by 80, we get 3 and a remainder of 75.
Record the quotient 3 as the next digit in the result. 
Result so far: 853.0
Subtracting 240 from 315 leaves us with 75.
Fetch the next digit (7) from the dividend, attach it to 75 and continue: 757 / 80

Let's proceed to step 6:
When dividing 757 by 80, we get 9 with a remainder of 37.
The next digit of our result is 9. 
Result so far: 8539.0
Deduct 720 from 757 and we're left with 37.
Fetch the next digit (1) from the dividend, attach it to 37 and continue: 371 / 80

Step 7:
The number 80 fits into 371 4 times, leaving a remainder of 51.
Write down 4 as next digit of the result. 
Result so far: 85394.0
Subtracting 320 from 371 leaves us with 51.
Take the next digit (5) from the dividend and append it to 51, then repeat: 515 / 80

On to step 8:
When dividing 515 by 80, we get 6 with a remainder of 35.
Put 6 as the next digit of the answer. 
Result so far: 853946.0
Subtracting 480 from 515 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 9:
80 can be fit into 350 4 times, resulting in a remainder of 30.
Record the quotient 4 as the next digit in the result. 
Result so far: 853946.4
The remainder is 30 after subtracting 320 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 10:
80 goes into 300 3 times with a remainder of 60.
The number 3 becomes the next digit in our result. 
Result so far: 853946.43
Deduct 240 from 300 and we're left 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 11:
80 can be fit into 600 7 times, resulting in a remainder of 40.
Write down 7 as next digit of the result. 
Result so far: 853946.437
If we take 560 away from 600, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 12:
80 can be fit into 400 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 853946.4375
Subtract 400 from 400 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 13:
When dividing 0 by 80, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 853946.4375
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 14:
0 divided by 80 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 853946.4375
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 853946.4375 and a remainder of 0.0.