939590 divided by 51 
We want to figure out the number of times 939590 can be divided by 51.

Step 1:
The number 51 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 51

Let's proceed to step 2:
If we divide 93 by 51, we get 1 and a remainder of 42.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 42 after subtracting 51 from 93.
Bring next digit (9) of the dividend behind the 42 and repeat the process: 429 / 51

Step 3:
The number 51 fits into 429 8 times, leaving a remainder of 21.
Use 8 as the next digit of our solution. 
Result so far: 18.0
The remainder is 21 after subtracting 408 from 429.
Fetch the next digit (5) from the dividend, attach it to 21 and continue: 215 / 51

Step 4:
51 can be fit into 215 4 times, resulting in a remainder of 11.
Write down 4 as next digit of the result. 
Result so far: 184.0
Subtracting 204 from 215 leaves us with 11.
Bring next digit (9) of the dividend behind the 11 and repeat the process: 119 / 51

On to step 5:
If we divide 119 by 51, we get 2 and a remainder of 17.
The number 2 becomes the next digit in our result. 
Result so far: 1842.0
If we take 102 away from 119, we end up with 17.
Grab the next digit (0) from the dividend, add it to 17, then carry on: 170 / 51

Moving on to step 6:
51 goes into 170 3 times with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 18423.0
Deduct 153 from 170 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
The number 51 fits into 170 3 times, leaving a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 18423.3
Subtracting 153 from 170 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 8:
If we divide 170 by 51, we get 3 and a remainder of 17.
The next digit of our result is 3. 
Result so far: 18423.33
If we subtract 153 from 170, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

The quotient of the division is 18423.33, and the remainder is 0.017.