55397042 ÷ 858 
Let's see how many times 858 fits into 55397042.

On to step 1:
When dividing 5 by 858, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (5) of the dividend behind the 5 and repeat the process: 55 / 858

Step 2:
858 goes into 55 0 times with a remainder of 55.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 55, we end up with 55.
Bring next digit (3) of the dividend behind the 55 and repeat the process: 553 / 858

On to step 3:
When dividing 553 by 858, we get 0 with a remainder of 553.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 553 and we're left with 553.
Bring next digit (9) of the dividend behind the 553 and repeat the process: 5539 / 858

Moving on to step 4:
858 goes into 5539 6 times with a remainder of 391.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtracting 5148 from 5539 leaves us with 391.
Include the next digit (7) from the dividend after 391, then repeat: 3917 / 858

On to step 5:
858 goes into 3917 4 times with a remainder of 485.
The number 4 becomes the next digit in our result. 
Result so far: 64.0
Subtract 3432 from 3917 to get 485.
Include the next digit (0) from the dividend after 485, then repeat: 4850 / 858

Going ahead to step 6:
858 can be fit into 4850 5 times, resulting in a remainder of 560.
Write down 5 as next digit of the result. 
Result so far: 645.0
Subtract 4290 from 4850 to get 560.
Fetch the next digit (4) from the dividend, attach it to 560 and continue: 5604 / 858

Going ahead to step 7:
If we divide 5604 by 858, we get 6 and a remainder of 456.
Put 6 as the next digit of the answer. 
Result so far: 6456.0
If we subtract 5148 from 5604, we get 456.
Append the next digit (2) from the dividend to 456 and continue with: 4562 / 858

Step 8:
4562 divided by 858 is 5 with a remainder of 272.
The next digit of our result is 5. 
Result so far: 64565.0
Deduct 4290 from 4562 and we're left with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Advancing to step 9:
The number 858 fits into 2720 3 times, leaving a remainder of 146.
The next digit of our result is 3. 
Result so far: 64565.3
If we subtract 2574 from 2720, we get 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Going ahead to step 10:
The number 858 fits into 1460 1 times, leaving a remainder of 602.
The next digit of our result is 1. 
Result so far: 64565.31
The remainder is 602 after subtracting 858 from 1460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6020, and continue the process.

Going ahead to step 11:
6020 divided by 858 is 7 with a remainder of 14.
The next digit of our result is 7. 
Result so far: 64565.317
If we take 6006 away from 6020, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 12:
If we divide 140 by 858, we get 0 and a remainder of 140.
Write down 0 as next digit of the result. 
Result so far: 64565.317
Subtract 0 from 140 to get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Advancing to step 13:
858 goes into 1400 1 times with a remainder of 542.
The next digit of our result is 1. 
Result so far: 64565.31701
If we subtract 858 from 1400, we get 542.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5420, and continue the process.

Going ahead to step 14:
When dividing 5420 by 858, we get 6 with a remainder of 272.
The number 6 becomes the next digit in our result. 
Result so far: 64565.317016
Deduct 5148 from 5420 and we're left with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Going ahead to step 15:
858 can be fit into 2720 3 times, resulting in a remainder of 146.
Put 3 as the next digit of the answer. 
Result so far: 64565.3170163
Subtract 2574 from 2720 to get 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Step 16:
858 goes into 1460 1 times with a remainder of 602.
The next digit of our result is 1. 
Result so far: 64565.31701631
If we subtract 858 from 1460, we get 602.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6020, and continue the process.

In conclusion, the division gives 64565.31701631 with a balance of 6.02e-07.