We divide 78172531 by 455
We want to divide 78172531 by 455.

Advancing to step 1:
7 divided by 455 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 455

Moving on to step 2:
When dividing 78 by 455, we get 0 with a remainder of 78.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Fetch the next digit (1) from the dividend, attach it to 78 and continue: 781 / 455

Moving on to step 3:
If we divide 781 by 455, we get 1 and a remainder of 326.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 455 from 781 to get 326.
Bring next digit (7) of the dividend behind the 326 and repeat the process: 3267 / 455

Moving on to step 4:
If we divide 3267 by 455, we get 7 and a remainder of 82.
The next digit of our result is 7. 
Result so far: 17.0
Subtracting 3185 from 3267 leaves us with 82.
Include the next digit (2) from the dividend after 82, then repeat: 822 / 455

On to step 5:
822 divided by 455 is 1 with a remainder of 367.
Write down 1 as next digit of the result. 
Result so far: 171.0
Deduct 455 from 822 and we're left with 367.
Take the next digit (5) from the dividend and append it to 367, then repeat: 3675 / 455

Moving on to step 6:
If we divide 3675 by 455, we get 8 and a remainder of 35.
Record the quotient 8 as the next digit in the result. 
Result so far: 1718.0
Subtracting 3640 from 3675 leaves us with 35.
Bring next digit (3) of the dividend behind the 35 and repeat the process: 353 / 455

On to step 7:
455 goes into 353 0 times with a remainder of 353.
The number 0 becomes the next digit in our result. 
Result so far: 17180.0
Subtract 0 from 353 to get 353.
Bring next digit (1) of the dividend behind the 353 and repeat the process: 3531 / 455

Moving on to step 8:
If we divide 3531 by 455, we get 7 and a remainder of 346.
Record the quotient 7 as the next digit in the result. 
Result so far: 171807.0
If we take 3185 away from 3531, we end up with 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

Going ahead to step 9:
455 goes into 3460 7 times with a remainder of 275.
Put 7 as the next digit of the answer. 
Result so far: 171807.7
Subtracting 3185 from 3460 leaves us with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Advancing to step 10:
455 goes into 2750 6 times with a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 171807.76
Subtract 2730 from 2750 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 11:
When dividing 200 by 455, we get 0 with a remainder of 200.
Write down 0 as next digit of the result. 
Result so far: 171807.76
Subtract 0 from 200 to get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

On to step 12:
2000 divided by 455 is 4 with a remainder of 180.
Put 4 as the next digit of the answer. 
Result so far: 171807.7604
Deduct 1820 from 2000 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.

Advancing to step 13:
The number 455 fits into 1800 3 times, leaving a remainder of 435.
Use 3 as the next digit of our solution. 
Result so far: 171807.76043
If we subtract 1365 from 1800, we get 435.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4350, and continue the process.

Let's proceed to step 14:
4350 divided by 455 is 9 with a remainder of 255.
Write down 9 as next digit of the result. 
Result so far: 171807.760439
Subtract 4095 from 4350 to get 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

On to step 15:
455 can be fit into 2550 5 times, resulting in a remainder of 275.
The next digit of our result is 5. 
Result so far: 171807.7604395
Subtracting 2275 from 2550 leaves us with 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Moving on to step 16:
If we divide 2750 by 455, we get 6 and a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 171807.76043956
The remainder is 20 after subtracting 2730 from 2750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The quotient of the division is 171807.76043956, and the remainder is 2e-08.