42129852 divided by 812 
We want to figure out the number of times 42129852 can be divided by 812.

Going ahead to step 1:
If we divide 4 by 812, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 812

Going ahead to step 2:
812 can be fit into 42 0 times, resulting in a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Take the next digit (1) from the dividend and append it to 42, then repeat: 421 / 812

Moving on to step 3:
If we divide 421 by 812, we get 0 and a remainder of 421.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 421 after subtracting 0 from 421.
Fetch the next digit (2) from the dividend, attach it to 421 and continue: 4212 / 812

Going ahead to step 4:
4212 divided by 812 is 5 with a remainder of 152.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we subtract 4060 from 4212, we get 152.
Grab the next digit (9) from the dividend, add it to 152, then carry on: 1529 / 812

Let's proceed to step 5:
1529 divided by 812 is 1 with a remainder of 717.
Put 1 as the next digit of the answer. 
Result so far: 51.0
If we take 812 away from 1529, we end up with 717.
Take the next digit (8) from the dividend and append it to 717, then repeat: 7178 / 812

Step 6:
When dividing 7178 by 812, we get 8 with a remainder of 682.
Write down 8 as next digit of the result. 
Result so far: 518.0
Subtracting 6496 from 7178 leaves us with 682.
Append the next digit (5) from the dividend to 682 and continue with: 6825 / 812

On to step 7:
If we divide 6825 by 812, we get 8 and a remainder of 329.
The next digit of our result is 8. 
Result so far: 5188.0
The remainder is 329 after subtracting 6496 from 6825.
Grab the next digit (2) from the dividend, add it to 329, then carry on: 3292 / 812

Advancing to step 8:
3292 divided by 812 is 4 with a remainder of 44.
The number 4 becomes the next digit in our result. 
Result so far: 51884.0
The remainder is 44 after subtracting 3248 from 3292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 9:
If we divide 440 by 812, we get 0 and a remainder of 440.
Record the quotient 0 as the next digit in the result. 
Result so far: 51884.0
Deduct 0 from 440 and we're left with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Going ahead to step 10:
When dividing 4400 by 812, we get 5 with a remainder of 340.
The number 5 becomes the next digit in our result. 
Result so far: 51884.05
If we subtract 4060 from 4400, we get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Advancing to step 11:
When dividing 3400 by 812, we get 4 with a remainder of 152.
Record the quotient 4 as the next digit in the result. 
Result so far: 51884.054
If we subtract 3248 from 3400, we get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Moving on to step 12:
812 goes into 1520 1 times with a remainder of 708.
The next digit of our result is 1. 
Result so far: 51884.0541
If we take 812 away from 1520, we end up with 708.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7080, and continue the process.

Advancing to step 13:
If we divide 7080 by 812, we get 8 and a remainder of 584.
The next digit of our result is 8. 
Result so far: 51884.05418
Subtracting 6496 from 7080 leaves us with 584.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5840, and continue the process.

Let's proceed to step 14:
If we divide 5840 by 812, we get 7 and a remainder of 156.
The number 7 becomes the next digit in our result. 
Result so far: 51884.054187
The remainder is 156 after subtracting 5684 from 5840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Moving on to step 15:
812 goes into 1560 1 times with a remainder of 748.
Use 1 as the next digit of our solution. 
Result so far: 51884.0541871
The remainder is 748 after subtracting 812 from 1560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7480, and continue the process.

Let's proceed to step 16:
812 can be fit into 7480 9 times, resulting in a remainder of 172.
Write down 9 as next digit of the result. 
Result so far: 51884.05418719
If we take 7308 away from 7480, we end up with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

In conclusion, the division gives 51884.05418719 with a balance of 1.72e-07.