We look at the division of 780591 by 87 
We want to figure out the number of times 780591 can be divided by 87.

On to step 1:
If we divide 7 by 87, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 87

On to step 2:
78 divided by 87 is 0 with a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Grab the next digit (0) from the dividend, add it to 78, then carry on: 780 / 87

Step 3:
When dividing 780 by 87, we get 8 with a remainder of 84.
Put 8 as the next digit of the answer. 
Result so far: 8.0
The remainder is 84 after subtracting 696 from 780.
Include the next digit (5) from the dividend after 84, then repeat: 845 / 87

Step 4:
The number 87 fits into 845 9 times, leaving a remainder of 62.
Put 9 as the next digit of the answer. 
Result so far: 89.0
Deduct 783 from 845 and we're left with 62.
Fetch the next digit (9) from the dividend, attach it to 62 and continue: 629 / 87

Step 5:
When dividing 629 by 87, we get 7 with a remainder of 20.
Use 7 as the next digit of our solution. 
Result so far: 897.0
If we take 609 away from 629, we end up with 20.
Append the next digit (1) from the dividend to 20 and continue with: 201 / 87

Step 6:
201 divided by 87 is 2 with a remainder of 27.
Use 2 as the next digit of our solution. 
Result so far: 8972.0
If we take 174 away from 201, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 7:
87 goes into 270 3 times with a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 8972.3
Subtracting 261 from 270 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 8:
90 divided by 87 is 1 with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 8972.31
The remainder is 3 after subtracting 87 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 9:
87 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 8972.31
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 10:
300 divided by 87 is 3 with a remainder of 39.
Record the quotient 3 as the next digit in the result. 
Result so far: 8972.3103
Subtract 261 from 300 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 11:
The number 87 fits into 390 4 times, leaving a remainder of 42.
Use 4 as the next digit of our solution. 
Result so far: 8972.31034
Deduct 348 from 390 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 12:
87 can be fit into 420 4 times, resulting in a remainder of 72.
Record the quotient 4 as the next digit in the result. 
Result so far: 8972.310344
Subtracting 348 from 420 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Our division results in 8972.310344 with a remaining 7.2e-06.