Let's divide 515910 by 42
We're looking to find how many times 42 goes into 515910.

On to step 1:
5 divided by 42 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 42

Moving on to step 2:
42 goes into 51 1 times with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 42 from 51 and we're left with 9.
Fetch the next digit (5) from the dividend, attach it to 9 and continue: 95 / 42

Advancing to step 3:
When dividing 95 by 42, we get 2 with a remainder of 11.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
The remainder is 11 after subtracting 84 from 95.
Fetch the next digit (9) from the dividend, attach it to 11 and continue: 119 / 42

Let's proceed to step 4:
42 goes into 119 2 times with a remainder of 35.
Record the quotient 2 as the next digit in the result. 
Result so far: 122.0
Subtract 84 from 119 to get 35.
Bring next digit (1) of the dividend behind the 35 and repeat the process: 351 / 42

Going ahead to step 5:
If we divide 351 by 42, we get 8 and a remainder of 15.
The next digit of our result is 8. 
Result so far: 1228.0
The remainder is 15 after subtracting 336 from 351.
Grab the next digit (0) from the dividend, add it to 15, then carry on: 150 / 42

Moving on to step 6:
42 goes into 150 3 times with a remainder of 24.
Use 3 as the next digit of our solution. 
Result so far: 12283.0
Subtract 126 from 150 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 7:
42 can be fit into 240 5 times, resulting in a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 12283.5
The remainder is 30 after subtracting 210 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 8:
42 goes into 300 7 times with a remainder of 6.
Record the quotient 7 as the next digit in the result. 
Result so far: 12283.57
Deduct 294 from 300 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 9:
42 can be fit into 60 1 times, resulting in a remainder of 18.
The next digit of our result is 1. 
Result so far: 12283.571
Subtracting 42 from 60 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 10:
180 divided by 42 is 4 with a remainder of 12.
Record the quotient 4 as the next digit in the result. 
Result so far: 12283.5714
Subtract 168 from 180 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 11:
When dividing 120 by 42, we get 2 with a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 12283.57142
If we take 84 away from 120, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 12:
When dividing 360 by 42, we get 8 with a remainder of 24.
Write down 8 as next digit of the result. 
Result so far: 12283.571428
Subtracting 336 from 360 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 13:
42 can be fit into 240 5 times, resulting in a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 12283.5714285
If we take 210 away from 240, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 14:
If we divide 300 by 42, we get 7 and a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 12283.57142857
The remainder is 6 after subtracting 294 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The quotient of the division is 12283.57142857, and the remainder is 6e-09.