Let's divide 21049184 by 78
We want to figure out the number of times 21049184 can be divided by 78.

Advancing to step 1:
The number 78 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 78

Step 2:
21 divided by 78 is 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Bring next digit (0) of the dividend behind the 21 and repeat the process: 210 / 78

Step 3:
210 divided by 78 is 2 with a remainder of 54.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 156 from 210 and we're left with 54.
Take the next digit (4) from the dividend and append it to 54, then repeat: 544 / 78

On to step 4:
78 goes into 544 6 times with a remainder of 76.
Write down 6 as next digit of the result. 
Result so far: 26.0
The remainder is 76 after subtracting 468 from 544.
Append the next digit (9) from the dividend to 76 and continue with: 769 / 78

Moving on to step 5:
If we divide 769 by 78, we get 9 and a remainder of 67.
Record the quotient 9 as the next digit in the result. 
Result so far: 269.0
Deduct 702 from 769 and we're left with 67.
Fetch the next digit (1) from the dividend, attach it to 67 and continue: 671 / 78

Advancing to step 6:
The number 78 fits into 671 8 times, leaving a remainder of 47.
Record the quotient 8 as the next digit in the result. 
Result so far: 2698.0
If we subtract 624 from 671, we get 47.
Bring next digit (8) of the dividend behind the 47 and repeat the process: 478 / 78

Advancing to step 7:
478 divided by 78 is 6 with a remainder of 10.
The next digit of our result is 6. 
Result so far: 26986.0
The remainder is 10 after subtracting 468 from 478.
Append the next digit (4) from the dividend to 10 and continue with: 104 / 78

Step 8:
The number 78 fits into 104 1 times, leaving a remainder of 26.
The next digit of our result is 1. 
Result so far: 269861.0
Deduct 78 from 104 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 9:
If we divide 260 by 78, we get 3 and a remainder of 26.
The next digit of our result is 3. 
Result so far: 269861.3
If we subtract 234 from 260, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 10:
When dividing 260 by 78, we get 3 with a remainder of 26.
The number 3 becomes the next digit in our result. 
Result so far: 269861.33
If we take 234 away from 260, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

The final result is 269861.33 with a remainder of 0.026.