We're dividing 42840255 by 859 
We want to figure out the number of times 42840255 can be divided by 859.

Moving on to step 1:
859 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 859

Advancing to step 2:
859 can be fit into 42 0 times, resulting in a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Take the next digit (8) from the dividend and append it to 42, then repeat: 428 / 859

On to step 3:
859 goes into 428 0 times with a remainder of 428.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 428, we get 428.
Take the next digit (4) from the dividend and append it to 428, then repeat: 4284 / 859

Advancing to step 4:
859 can be fit into 4284 4 times, resulting in a remainder of 848.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we take 3436 away from 4284, we end up with 848.
Append the next digit (0) from the dividend to 848 and continue with: 8480 / 859

Step 5:
If we divide 8480 by 859, we get 9 and a remainder of 749.
Put 9 as the next digit of the answer. 
Result so far: 49.0
If we take 7731 away from 8480, we end up with 749.
Take the next digit (2) from the dividend and append it to 749, then repeat: 7492 / 859

On to step 6:
859 can be fit into 7492 8 times, resulting in a remainder of 620.
Record the quotient 8 as the next digit in the result. 
Result so far: 498.0
Subtract 6872 from 7492 to get 620.
Bring next digit (5) of the dividend behind the 620 and repeat the process: 6205 / 859

Let's proceed to step 7:
The number 859 fits into 6205 7 times, leaving a remainder of 192.
Record the quotient 7 as the next digit in the result. 
Result so far: 4987.0
If we subtract 6013 from 6205, we get 192.
Append the next digit (5) from the dividend to 192 and continue with: 1925 / 859

Advancing to step 8:
The number 859 fits into 1925 2 times, leaving a remainder of 207.
The next digit of our result is 2. 
Result so far: 49872.0
Subtracting 1718 from 1925 leaves us with 207.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2070, and continue the process.

Advancing to step 9:
When dividing 2070 by 859, we get 2 with a remainder of 352.
Use 2 as the next digit of our solution. 
Result so far: 49872.2
If we subtract 1718 from 2070, we get 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

On to step 10:
The number 859 fits into 3520 4 times, leaving a remainder of 84.
The next digit of our result is 4. 
Result so far: 49872.24
Subtract 3436 from 3520 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Advancing to step 11:
840 divided by 859 is 0 with a remainder of 840.
Write down 0 as next digit of the result. 
Result so far: 49872.24
Subtracting 0 from 840 leaves us with 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

Going ahead to step 12:
859 can be fit into 8400 9 times, resulting in a remainder of 669.
Put 9 as the next digit of the answer. 
Result so far: 49872.2409
The remainder is 669 after subtracting 7731 from 8400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6690, and continue the process.

On to step 13:
When dividing 6690 by 859, we get 7 with a remainder of 677.
Record the quotient 7 as the next digit in the result. 
Result so far: 49872.24097
If we subtract 6013 from 6690, we get 677.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6770, and continue the process.

Let's proceed to step 14:
6770 divided by 859 is 7 with a remainder of 757.
Use 7 as the next digit of our solution. 
Result so far: 49872.240977
Subtracting 6013 from 6770 leaves us with 757.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7570, and continue the process.

The final outcome is 49872.240977, with a leftover of 7.57e-05.