We divide 42122934 by 86
We're looking to find how many times 86 goes into 42122934.

Advancing to step 1:
4 divided by 86 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 86

On to step 2:
The number 86 fits into 42 0 times, leaving 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 (1) from the dividend and append it to 42, then repeat: 421 / 86

On to step 3:
86 can be fit into 421 4 times, resulting in a remainder of 77.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 344 from 421 leaves us with 77.
Bring next digit (2) of the dividend behind the 77 and repeat the process: 772 / 86

Step 4:
772 divided by 86 is 8 with a remainder of 84.
Put 8 as the next digit of the answer. 
Result so far: 48.0
If we subtract 688 from 772, we get 84.
Include the next digit (2) from the dividend after 84, then repeat: 842 / 86

Going ahead to step 5:
86 can be fit into 842 9 times, resulting in a remainder of 68.
Use 9 as the next digit of our solution. 
Result so far: 489.0
Subtracting 774 from 842 leaves us with 68.
Grab the next digit (9) from the dividend, add it to 68, then carry on: 689 / 86

Step 6:
689 divided by 86 is 8 with a remainder of 1.
Record the quotient 8 as the next digit in the result. 
Result so far: 4898.0
Subtracting 688 from 689 leaves us with 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 86

Step 7:
13 divided by 86 is 0 with a remainder of 13.
The next digit of our result is 0. 
Result so far: 48980.0
If we take 0 away from 13, we end up with 13.
Grab the next digit (4) from the dividend, add it to 13, then carry on: 134 / 86

Advancing to step 8:
When dividing 134 by 86, we get 1 with a remainder of 48.
Write down 1 as next digit of the result. 
Result so far: 489801.0
If we subtract 86 from 134, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 9:
86 goes into 480 5 times with a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 489801.5
Deduct 430 from 480 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 10:
When dividing 500 by 86, we get 5 with a remainder of 70.
The next digit of our result is 5. 
Result so far: 489801.55
If we subtract 430 from 500, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Our division results in 489801.55 with a remaining 0.07.