99525549 ÷ 858 
We want to divide 99525549 by 858.

Let's proceed to step 1:
858 goes into 9 0 times with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Include the next digit (9) from the dividend after 9, then repeat: 99 / 858

On to step 2:
99 divided by 858 is 0 with a remainder of 99.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 99, we get 99.
Bring next digit (5) of the dividend behind the 99 and repeat the process: 995 / 858

Moving on to step 3:
If we divide 995 by 858, we get 1 and a remainder of 137.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 858 from 995 and we're left with 137.
Grab the next digit (2) from the dividend, add it to 137, then carry on: 1372 / 858

Moving on to step 4:
858 can be fit into 1372 1 times, resulting in a remainder of 514.
The next digit of our result is 1. 
Result so far: 11.0
If we take 858 away from 1372, we end up with 514.
Grab the next digit (5) from the dividend, add it to 514, then carry on: 5145 / 858

Moving on to step 5:
The number 858 fits into 5145 5 times, leaving a remainder of 855.
Record the quotient 5 as the next digit in the result. 
Result so far: 115.0
If we subtract 4290 from 5145, we get 855.
Bring next digit (5) of the dividend behind the 855 and repeat the process: 8555 / 858

Step 6:
858 can be fit into 8555 9 times, resulting in a remainder of 833.
Write down 9 as next digit of the result. 
Result so far: 1159.0
Subtracting 7722 from 8555 leaves us with 833.
Append the next digit (4) from the dividend to 833 and continue with: 8334 / 858

Advancing to step 7:
8334 divided by 858 is 9 with a remainder of 612.
Use 9 as the next digit of our solution. 
Result so far: 11599.0
If we subtract 7722 from 8334, we get 612.
Grab the next digit (9) from the dividend, add it to 612, then carry on: 6129 / 858

Going ahead to step 8:
If we divide 6129 by 858, we get 7 and a remainder of 123.
The number 7 becomes the next digit in our result. 
Result so far: 115997.0
If we take 6006 away from 6129, we end up with 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

Let's proceed to step 9:
If we divide 1230 by 858, we get 1 and a remainder of 372.
The next digit of our result is 1. 
Result so far: 115997.1
If we subtract 858 from 1230, we get 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Step 10:
3720 divided by 858 is 4 with a remainder of 288.
Write down 4 as next digit of the result. 
Result so far: 115997.14
The remainder is 288 after subtracting 3432 from 3720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Advancing to step 11:
858 goes into 2880 3 times with a remainder of 306.
Record the quotient 3 as the next digit in the result. 
Result so far: 115997.143
The remainder is 306 after subtracting 2574 from 2880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Let's proceed to step 12:
If we divide 3060 by 858, we get 3 and a remainder of 486.
Put 3 as the next digit of the answer. 
Result so far: 115997.1433
Subtract 2574 from 3060 to get 486.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4860, and continue the process.

The quotient of the division is 115997.1433, and the remainder is 0.00486.