53257261 divided by 858 
Let's see how many times 858 fits into 53257261.

Step 1:
858 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 858

On to step 2:
53 divided by 858 is 0 with a remainder of 53.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 53, we get 53.
Append the next digit (2) from the dividend to 53 and continue with: 532 / 858

Moving on to step 3:
The number 858 fits into 532 0 times, leaving a remainder of 532.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 532, we get 532.
Grab the next digit (5) from the dividend, add it to 532, then carry on: 5325 / 858

Let's proceed to step 4:
The number 858 fits into 5325 6 times, leaving a remainder of 177.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we take 5148 away from 5325, we end up with 177.
Include the next digit (7) from the dividend after 177, then repeat: 1777 / 858

Going ahead to step 5:
1777 divided by 858 is 2 with a remainder of 61.
Put 2 as the next digit of the answer. 
Result so far: 62.0
Subtracting 1716 from 1777 leaves us with 61.
Bring next digit (2) of the dividend behind the 61 and repeat the process: 612 / 858

On to step 6:
If we divide 612 by 858, we get 0 and a remainder of 612.
The number 0 becomes the next digit in our result. 
Result so far: 620.0
If we subtract 0 from 612, we get 612.
Bring next digit (6) of the dividend behind the 612 and repeat the process: 6126 / 858

Step 7:
858 goes into 6126 7 times with a remainder of 120.
Write down 7 as next digit of the result. 
Result so far: 6207.0
Deduct 6006 from 6126 and we're left with 120.
Append the next digit (1) from the dividend to 120 and continue with: 1201 / 858

Going ahead to step 8:
858 can be fit into 1201 1 times, resulting in a remainder of 343.
Record the quotient 1 as the next digit in the result. 
Result so far: 62071.0
If we take 858 away from 1201, we end up with 343.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3430, and continue the process.

Advancing to step 9:
If we divide 3430 by 858, we get 3 and a remainder of 856.
The next digit of our result is 3. 
Result so far: 62071.3
The remainder is 856 after subtracting 2574 from 3430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8560, and continue the process.

Moving on to step 10:
8560 divided by 858 is 9 with a remainder of 838.
Record the quotient 9 as the next digit in the result. 
Result so far: 62071.39
If we take 7722 away from 8560, we end up with 838.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8380, and continue the process.

Let's proceed to step 11:
The number 858 fits into 8380 9 times, leaving a remainder of 658.
Write down 9 as next digit of the result. 
Result so far: 62071.399
If we subtract 7722 from 8380, we get 658.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6580, and continue the process.

The final result is 62071.399 with a remainder of 0.0658.