Let's divide 78585321 by 784
Our goal is to divide 78585321 by 784.

On to step 1:
784 goes into 7 0 times with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 784

On to step 2:
784 goes into 78 0 times with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Take the next digit (5) from the dividend and append it to 78, then repeat: 785 / 784

Going ahead to step 3:
If we divide 785 by 784, we get 1 and a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 784 away from 785, we end up with 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 784

Moving on to step 4:
784 can be fit into 18 0 times, resulting in a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtract 0 from 18 to get 18.
Bring next digit (5) of the dividend behind the 18 and repeat the process: 185 / 784

On to step 5:
When dividing 185 by 784, we get 0 with a remainder of 185.
Put 0 as the next digit of the answer. 
Result so far: 100.0
Subtract 0 from 185 to get 185.
Take the next digit (3) from the dividend and append it to 185, then repeat: 1853 / 784

Going ahead to step 6:
784 can be fit into 1853 2 times, resulting in a remainder of 285.
The number 2 becomes the next digit in our result. 
Result so far: 1002.0
Subtracting 1568 from 1853 leaves us with 285.
Take the next digit (2) from the dividend and append it to 285, then repeat: 2852 / 784

Going ahead to step 7:
784 goes into 2852 3 times with a remainder of 500.
Write down 3 as next digit of the result. 
Result so far: 10023.0
Subtract 2352 from 2852 to get 500.
Grab the next digit (1) from the dividend, add it to 500, then carry on: 5001 / 784

Advancing to step 8:
784 can be fit into 5001 6 times, resulting in a remainder of 297.
The next digit of our result is 6. 
Result so far: 100236.0
Subtract 4704 from 5001 to get 297.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2970, and continue the process.

Let's proceed to step 9:
2970 divided by 784 is 3 with a remainder of 618.
The next digit of our result is 3. 
Result so far: 100236.3
Subtract 2352 from 2970 to get 618.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6180, and continue the process.

Moving on to step 10:
784 can be fit into 6180 7 times, resulting in a remainder of 692.
Put 7 as the next digit of the answer. 
Result so far: 100236.37
If we subtract 5488 from 6180, we get 692.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6920, and continue the process.

Going ahead to step 11:
If we divide 6920 by 784, we get 8 and a remainder of 648.
Use 8 as the next digit of our solution. 
Result so far: 100236.378
If we take 6272 away from 6920, we end up with 648.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6480, and continue the process.

Step 12:
If we divide 6480 by 784, we get 8 and a remainder of 208.
The next digit of our result is 8. 
Result so far: 100236.3788
Subtracting 6272 from 6480 leaves us with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

The final outcome is 100236.3788, with a leftover of 0.00208.