3909778 ÷ 505 
We want to figure out the number of times 3909778 can be divided by 505.

On to step 1:
505 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 505

On to step 2:
If we divide 39 by 505, we get 0 and a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Fetch the next digit (0) from the dividend, attach it to 39 and continue: 390 / 505

On to step 3:
505 can be fit into 390 0 times, resulting in a remainder of 390.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 390 leaves us with 390.
Fetch the next digit (9) from the dividend, attach it to 390 and continue: 3909 / 505

Step 4:
3909 divided by 505 is 7 with a remainder of 374.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 374 after subtracting 3535 from 3909.
Fetch the next digit (7) from the dividend, attach it to 374 and continue: 3747 / 505

Let's proceed to step 5:
3747 divided by 505 is 7 with a remainder of 212.
Use 7 as the next digit of our solution. 
Result so far: 77.0
Deduct 3535 from 3747 and we're left with 212.
Include the next digit (7) from the dividend after 212, then repeat: 2127 / 505

On to step 6:
505 goes into 2127 4 times with a remainder of 107.
Write down 4 as next digit of the result. 
Result so far: 774.0
The remainder is 107 after subtracting 2020 from 2127.
Bring next digit (8) of the dividend behind the 107 and repeat the process: 1078 / 505

Let's proceed to step 7:
If we divide 1078 by 505, we get 2 and a remainder of 68.
The next digit of our result is 2. 
Result so far: 7742.0
Subtracting 1010 from 1078 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 8:
The number 505 fits into 680 1 times, leaving a remainder of 175.
Write down 1 as next digit of the result. 
Result so far: 7742.1
Deduct 505 from 680 and we're left with 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

On to step 9:
505 can be fit into 1750 3 times, resulting in a remainder of 235.
The next digit of our result is 3. 
Result so far: 7742.13
Subtract 1515 from 1750 to get 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Advancing to step 10:
505 can be fit into 2350 4 times, resulting in a remainder of 330.
The number 4 becomes the next digit in our result. 
Result so far: 7742.134
Deduct 2020 from 2350 and we're left with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Advancing to step 11:
3300 divided by 505 is 6 with a remainder of 270.
Use 6 as the next digit of our solution. 
Result so far: 7742.1346
Subtracting 3030 from 3300 leaves us with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Advancing to step 12:
If we divide 2700 by 505, we get 5 and a remainder of 175.
The number 5 becomes the next digit in our result. 
Result so far: 7742.13465
If we take 2525 away from 2700, we end up with 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Let's proceed to step 13:
If we divide 1750 by 505, we get 3 and a remainder of 235.
The number 3 becomes the next digit in our result. 
Result so far: 7742.134653
Subtract 1515 from 1750 to get 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Let's proceed to step 14:
505 can be fit into 2350 4 times, resulting in a remainder of 330.
The next digit of our result is 4. 
Result so far: 7742.1346534
If we take 2020 away from 2350, we end up with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Let's proceed to step 15:
505 goes into 3300 6 times with a remainder of 270.
The number 6 becomes the next digit in our result. 
Result so far: 7742.13465346
If we take 3030 away from 3300, we end up with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

The final outcome is 7742.13465346, with a leftover of 2.7e-07.