We're dividing 42129785 by 859 
Our goal is to divide 42129785 by 859.

Step 1:
859 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 859

Step 2:
42 divided by 859 is 0 with a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Fetch the next digit (1) from the dividend, attach it to 42 and continue: 421 / 859

Advancing to step 3:
859 goes into 421 0 times with a remainder of 421.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 421, we end up with 421.
Take the next digit (2) from the dividend and append it to 421, then repeat: 4212 / 859

Let's proceed to step 4:
When dividing 4212 by 859, we get 4 with a remainder of 776.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 3436 from 4212 and we're left with 776.
Grab the next digit (9) from the dividend, add it to 776, then carry on: 7769 / 859

Let's proceed to step 5:
859 goes into 7769 9 times with a remainder of 38.
Put 9 as the next digit of the answer. 
Result so far: 49.0
Subtract 7731 from 7769 to get 38.
Take the next digit (7) from the dividend and append it to 38, then repeat: 387 / 859

Going ahead to step 6:
If we divide 387 by 859, we get 0 and a remainder of 387.
Write down 0 as next digit of the result. 
Result so far: 490.0
If we take 0 away from 387, we end up with 387.
Grab the next digit (8) from the dividend, add it to 387, then carry on: 3878 / 859

Step 7:
The number 859 fits into 3878 4 times, leaving a remainder of 442.
The number 4 becomes the next digit in our result. 
Result so far: 4904.0
The remainder is 442 after subtracting 3436 from 3878.
Take the next digit (5) from the dividend and append it to 442, then repeat: 4425 / 859

Going ahead to step 8:
When dividing 4425 by 859, we get 5 with a remainder of 130.
Write down 5 as next digit of the result. 
Result so far: 49045.0
If we subtract 4295 from 4425, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Going ahead to step 9:
If we divide 1300 by 859, we get 1 and a remainder of 441.
Record the quotient 1 as the next digit in the result. 
Result so far: 49045.1
The remainder is 441 after subtracting 859 from 1300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4410, and continue the process.

Advancing to step 10:
When dividing 4410 by 859, we get 5 with a remainder of 115.
The number 5 becomes the next digit in our result. 
Result so far: 49045.15
If we subtract 4295 from 4410, we get 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Step 11:
If we divide 1150 by 859, we get 1 and a remainder of 291.
Put 1 as the next digit of the answer. 
Result so far: 49045.151
If we take 859 away from 1150, we end up with 291.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

Let's proceed to step 12:
When dividing 2910 by 859, we get 3 with a remainder of 333.
Write down 3 as next digit of the result. 
Result so far: 49045.1513
Deduct 2577 from 2910 and we're left with 333.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3330, and continue the process.

Step 13:
When dividing 3330 by 859, we get 3 with a remainder of 753.
Put 3 as the next digit of the answer. 
Result so far: 49045.15133
Subtract 2577 from 3330 to get 753.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7530, and continue the process.

In conclusion, the division gives 49045.15133 with a balance of 0.000753.