690099 ÷ 42 
Let's see how many times 42 fits into 690099.

Going ahead to step 1:
When dividing 6 by 42, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 42

Let's proceed to step 2:
The number 42 fits into 69 1 times, leaving a remainder of 27.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 42 from 69 leaves us with 27.
Fetch the next digit (0) from the dividend, attach it to 27 and continue: 270 / 42

Let's proceed to step 3:
If we divide 270 by 42, we get 6 and a remainder of 18.
Use 6 as the next digit of our solution. 
Result so far: 16.0
If we subtract 252 from 270, we get 18.
Fetch the next digit (0) from the dividend, attach it to 18 and continue: 180 / 42

On to step 4:
180 divided by 42 is 4 with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 164.0
Subtract 168 from 180 to get 12.
Fetch the next digit (9) from the dividend, attach it to 12 and continue: 129 / 42

Going ahead to step 5:
42 goes into 129 3 times with a remainder of 3.
Write down 3 as next digit of the result. 
Result so far: 1643.0
Subtracting 126 from 129 leaves us with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 42

Step 6:
42 goes into 39 0 times with a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 16430.0
If we take 0 away from 39, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 7:
42 can be fit into 390 9 times, resulting in a remainder of 12.
Write down 9 as next digit of the result. 
Result so far: 16430.9
If we subtract 378 from 390, we 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.

On to step 8:
120 divided by 42 is 2 with a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 16430.92
The remainder is 36 after subtracting 84 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 9:
42 can be fit into 360 8 times, resulting in a remainder of 24.
Put 8 as the next digit of the answer. 
Result so far: 16430.928
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.

Let's proceed to step 10:
240 divided by 42 is 5 with a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 16430.9285
If we subtract 210 from 240, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 11:
300 divided by 42 is 7 with a remainder of 6.
The next digit of our result is 7. 
Result so far: 16430.92857
Subtract 294 from 300 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 12:
42 goes into 60 1 times with a remainder of 18.
Use 1 as the next digit of our solution. 
Result so far: 16430.928571
If we take 42 away from 60, we end up 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.

On to step 13:
42 goes into 180 4 times with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 16430.9285714
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 14:
The number 42 fits into 120 2 times, leaving a remainder of 36.
The next digit of our result is 2. 
Result so far: 16430.92857142
The remainder is 36 after subtracting 84 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The final outcome is 16430.92857142, with a leftover of 3.6e-08.