78743921 ÷ 804 
We're looking to find how many times 804 goes into 78743921.

Going ahead to step 1:
If we divide 7 by 804, we get 0 and a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 804

Going ahead to step 2:
If we divide 78 by 804, we get 0 and a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Take the next digit (7) from the dividend and append it to 78, then repeat: 787 / 804

Step 3:
804 can be fit into 787 0 times, resulting in a remainder of 787.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 787 after subtracting 0 from 787.
Bring next digit (4) of the dividend behind the 787 and repeat the process: 7874 / 804

Let's proceed to step 4:
The number 804 fits into 7874 9 times, leaving a remainder of 638.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtracting 7236 from 7874 leaves us with 638.
Include the next digit (3) from the dividend after 638, then repeat: 6383 / 804

On to step 5:
804 can be fit into 6383 7 times, resulting in a remainder of 755.
The next digit of our result is 7. 
Result so far: 97.0
Subtract 5628 from 6383 to get 755.
Grab the next digit (9) from the dividend, add it to 755, then carry on: 7559 / 804

Step 6:
When dividing 7559 by 804, we get 9 with a remainder of 323.
Record the quotient 9 as the next digit in the result. 
Result so far: 979.0
If we subtract 7236 from 7559, we get 323.
Take the next digit (2) from the dividend and append it to 323, then repeat: 3232 / 804

Advancing to step 7:
804 goes into 3232 4 times with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 9794.0
Subtracting 3216 from 3232 leaves us with 16.
Take the next digit (1) from the dividend and append it to 16, then repeat: 161 / 804

Going ahead to step 8:
When dividing 161 by 804, we get 0 with a remainder of 161.
Write down 0 as next digit of the result. 
Result so far: 97940.0
Deduct 0 from 161 and we're left with 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

Let's proceed to step 9:
804 goes into 1610 2 times with a remainder of 2.
The next digit of our result is 2. 
Result so far: 97940.2
If we take 1608 away from 1610, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 10:
If we divide 20 by 804, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 97940.2
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 11:
If we divide 200 by 804, we get 0 and a remainder of 200.
Use 0 as the next digit of our solution. 
Result so far: 97940.2
Deduct 0 from 200 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The quotient of the division is 97940.2, and the remainder is 0.02.