510291 ÷ 87 
We want to figure out the number of times 510291 can be divided by 87.

Let's proceed to step 1:
If we divide 5 by 87, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 87

Moving on to step 2:
If we divide 51 by 87, we get 0 and a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Include the next digit (0) from the dividend after 51, then repeat: 510 / 87

Going ahead to step 3:
The number 87 fits into 510 5 times, leaving a remainder of 75.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 435 from 510 and we're left with 75.
Append the next digit (2) from the dividend to 75 and continue with: 752 / 87

Step 4:
The number 87 fits into 752 8 times, leaving a remainder of 56.
Write down 8 as next digit of the result. 
Result so far: 58.0
Deduct 696 from 752 and we're left with 56.
Fetch the next digit (9) from the dividend, attach it to 56 and continue: 569 / 87

Moving on to step 5:
When dividing 569 by 87, we get 6 with a remainder of 47.
Put 6 as the next digit of the answer. 
Result so far: 586.0
Subtract 522 from 569 to get 47.
Append the next digit (1) from the dividend to 47 and continue with: 471 / 87

Let's proceed to step 6:
471 divided by 87 is 5 with a remainder of 36.
Write down 5 as next digit of the result. 
Result so far: 5865.0
If we take 435 away from 471, we end up 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.

Going ahead to step 7:
87 goes into 360 4 times with a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 5865.4
Deduct 348 from 360 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 8:
87 goes into 120 1 times with a remainder of 33.
Record the quotient 1 as the next digit in the result. 
Result so far: 5865.41
Deduct 87 from 120 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 9:
When dividing 330 by 87, we get 3 with a remainder of 69.
Write down 3 as next digit of the result. 
Result so far: 5865.413
Subtracting 261 from 330 leaves us with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Moving on to step 10:
The number 87 fits into 690 7 times, leaving a remainder of 81.
Put 7 as the next digit of the answer. 
Result so far: 5865.4137
The remainder is 81 after subtracting 609 from 690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Step 11:
The number 87 fits into 810 9 times, leaving a remainder of 27.
The number 9 becomes the next digit in our result. 
Result so far: 5865.41379
Subtract 783 from 810 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 12:
When dividing 270 by 87, we get 3 with a remainder of 9.
The next digit of our result is 3. 
Result so far: 5865.413793
Subtract 261 from 270 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 13:
When dividing 90 by 87, we get 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 5865.4137931
Subtract 87 from 90 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 14:
When dividing 30 by 87, we get 0 with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 5865.4137931
If we subtract 0 from 30, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final result is 5865.4137931 with a remainder of 3e-08.