68078728 ÷ 451 
We want to divide 68078728 by 451.

Step 1:
When dividing 6 by 451, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 451

Moving on to step 2:
When dividing 68 by 451, we get 0 with a remainder of 68.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 68 leaves us with 68.
Fetch the next digit (0) from the dividend, attach it to 68 and continue: 680 / 451

Moving on to step 3:
When dividing 680 by 451, we get 1 with a remainder of 229.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 451 from 680 and we're left with 229.
Append the next digit (7) from the dividend to 229 and continue with: 2297 / 451

On to step 4:
451 can be fit into 2297 5 times, resulting in a remainder of 42.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Subtracting 2255 from 2297 leaves us with 42.
Grab the next digit (8) from the dividend, add it to 42, then carry on: 428 / 451

Step 5:
451 goes into 428 0 times with a remainder of 428.
Write down 0 as next digit of the result. 
Result so far: 150.0
If we take 0 away from 428, we end up with 428.
Grab the next digit (7) from the dividend, add it to 428, then carry on: 4287 / 451

Let's proceed to step 6:
451 can be fit into 4287 9 times, resulting in a remainder of 228.
The number 9 becomes the next digit in our result. 
Result so far: 1509.0
If we take 4059 away from 4287, we end up with 228.
Bring next digit (2) of the dividend behind the 228 and repeat the process: 2282 / 451

Let's proceed to step 7:
2282 divided by 451 is 5 with a remainder of 27.
The next digit of our result is 5. 
Result so far: 15095.0
Subtracting 2255 from 2282 leaves us with 27.
Include the next digit (8) from the dividend after 27, then repeat: 278 / 451

On to step 8:
451 goes into 278 0 times with a remainder of 278.
Put 0 as the next digit of the answer. 
Result so far: 150950.0
The remainder is 278 after subtracting 0 from 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Going ahead to step 9:
The number 451 fits into 2780 6 times, leaving a remainder of 74.
The number 6 becomes the next digit in our result. 
Result so far: 150950.6
The remainder is 74 after subtracting 2706 from 2780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 10:
The number 451 fits into 740 1 times, leaving a remainder of 289.
The next digit of our result is 1. 
Result so far: 150950.61
Deduct 451 from 740 and we're left with 289.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2890, and continue the process.

Let's proceed to step 11:
451 goes into 2890 6 times with a remainder of 184.
The number 6 becomes the next digit in our result. 
Result so far: 150950.616
The remainder is 184 after subtracting 2706 from 2890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

On to step 12:
When dividing 1840 by 451, we get 4 with a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 150950.6164
Deduct 1804 from 1840 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 13:
451 can be fit into 360 0 times, resulting in a remainder of 360.
Use 0 as the next digit of our solution. 
Result so far: 150950.6164
Subtracting 0 from 360 leaves us with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Moving on to step 14:
If we divide 3600 by 451, we get 7 and a remainder of 443.
The next digit of our result is 7. 
Result so far: 150950.616407
The remainder is 443 after subtracting 3157 from 3600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4430, and continue the process.

Advancing to step 15:
451 goes into 4430 9 times with a remainder of 371.
Put 9 as the next digit of the answer. 
Result so far: 150950.6164079
If we take 4059 away from 4430, we end up with 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Moving on to step 16:
When dividing 3710 by 451, we get 8 with a remainder of 102.
Put 8 as the next digit of the answer. 
Result so far: 150950.61640798
Deduct 3608 from 3710 and we're left with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

The final result is 150950.61640798 with a remainder of 1.02e-07.