872521 ÷ 51 
We're looking to find how many times 51 goes into 872521.

Going ahead to step 1:
If we divide 8 by 51, we get 0 and a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 51

Step 2:
87 divided by 51 is 1 with a remainder of 36.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 51 from 87 and we're left with 36.
Grab the next digit (2) from the dividend, add it to 36, then carry on: 362 / 51

On to step 3:
When dividing 362 by 51, we get 7 with a remainder of 5.
The next digit of our result is 7. 
Result so far: 17.0
Subtract 357 from 362 to get 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 51

Step 4:
If we divide 55 by 51, we get 1 and a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 171.0
The remainder is 4 after subtracting 51 from 55.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 51

Going ahead to step 5:
The number 51 fits into 42 0 times, leaving a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 1710.0
If we subtract 0 from 42, we get 42.
Grab the next digit (1) from the dividend, add it to 42, then carry on: 421 / 51

Going ahead to step 6:
421 divided by 51 is 8 with a remainder of 13.
Use 8 as the next digit of our solution. 
Result so far: 17108.0
If we take 408 away from 421, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 7:
If we divide 130 by 51, we get 2 and a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 17108.2
If we subtract 102 from 130, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 8:
The number 51 fits into 280 5 times, leaving a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 17108.25
Deduct 255 from 280 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 9:
250 divided by 51 is 4 with a remainder of 46.
Write down 4 as next digit of the result. 
Result so far: 17108.254
Deduct 204 from 250 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 10:
When dividing 460 by 51, we get 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 17108.2549
Subtract 459 from 460 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 11:
When dividing 10 by 51, we get 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 17108.2549
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
100 divided by 51 is 1 with a remainder of 49.
The number 1 becomes the next digit in our result. 
Result so far: 17108.254901
The remainder is 49 after subtracting 51 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Advancing to step 13:
490 divided by 51 is 9 with a remainder of 31.
The number 9 becomes the next digit in our result. 
Result so far: 17108.2549019
If we subtract 459 from 490, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 14:
If we divide 310 by 51, we get 6 and a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 17108.25490196
Subtracting 306 from 310 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The quotient of the division is 17108.25490196, and the remainder is 4e-09.