We're dividing 99455553 by 858 
Let's see how many times 858 fits into 99455553.

Step 1:
9 divided by 858 is 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 858

Advancing to step 2:
858 goes into 99 0 times with a remainder of 99.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 99 leaves us with 99.
Grab the next digit (4) from the dividend, add it to 99, then carry on: 994 / 858

Going ahead to step 3:
When dividing 994 by 858, we get 1 with a remainder of 136.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 858 from 994, we get 136.
Append the next digit (5) from the dividend to 136 and continue with: 1365 / 858

Step 4:
The number 858 fits into 1365 1 times, leaving a remainder of 507.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtract 858 from 1365 to get 507.
Include the next digit (5) from the dividend after 507, then repeat: 5075 / 858

Advancing to step 5:
The number 858 fits into 5075 5 times, leaving a remainder of 785.
The number 5 becomes the next digit in our result. 
Result so far: 115.0
Subtract 4290 from 5075 to get 785.
Append the next digit (5) from the dividend to 785 and continue with: 7855 / 858

On to step 6:
When dividing 7855 by 858, we get 9 with a remainder of 133.
Put 9 as the next digit of the answer. 
Result so far: 1159.0
Subtract 7722 from 7855 to get 133.
Bring next digit (5) of the dividend behind the 133 and repeat the process: 1335 / 858

On to step 7:
1335 divided by 858 is 1 with a remainder of 477.
Use 1 as the next digit of our solution. 
Result so far: 11591.0
If we subtract 858 from 1335, we get 477.
Bring next digit (3) of the dividend behind the 477 and repeat the process: 4773 / 858

Step 8:
When dividing 4773 by 858, we get 5 with a remainder of 483.
Write down 5 as next digit of the result. 
Result so far: 115915.0
Deduct 4290 from 4773 and we're left with 483.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4830, and continue the process.

Advancing to step 9:
If we divide 4830 by 858, we get 5 and a remainder of 540.
Record the quotient 5 as the next digit in the result. 
Result so far: 115915.5
Deduct 4290 from 4830 and we're left with 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Advancing to step 10:
When dividing 5400 by 858, we get 6 with a remainder of 252.
Record the quotient 6 as the next digit in the result. 
Result so far: 115915.56
If we take 5148 away from 5400, we end up with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Moving on to step 11:
858 goes into 2520 2 times with a remainder of 804.
Record the quotient 2 as the next digit in the result. 
Result so far: 115915.562
Subtract 1716 from 2520 to get 804.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8040, and continue the process.

Advancing to step 12:
858 goes into 8040 9 times with a remainder of 318.
Record the quotient 9 as the next digit in the result. 
Result so far: 115915.5629
If we take 7722 away from 8040, we end up with 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Going ahead to step 13:
858 goes into 3180 3 times with a remainder of 606.
Use 3 as the next digit of our solution. 
Result so far: 115915.56293
If we subtract 2574 from 3180, we get 606.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

Going ahead to step 14:
When dividing 6060 by 858, we get 7 with a remainder of 54.
The number 7 becomes the next digit in our result. 
Result so far: 115915.562937
Subtract 6006 from 6060 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Going ahead to step 15:
540 divided by 858 is 0 with a remainder of 540.
Put 0 as the next digit of the answer. 
Result so far: 115915.562937
Subtracting 0 from 540 leaves us with 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Let's proceed to step 16:
If we divide 5400 by 858, we get 6 and a remainder of 252.
Write down 6 as next digit of the result. 
Result so far: 115915.56293706
If we take 5148 away from 5400, we end up with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

The final outcome is 115915.56293706, with a leftover of 2.52e-07.