We divide 421124 by 78
Let's see how many times 78 fits into 421124.

Advancing to step 1:
If we divide 4 by 78, we get 0 and a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 78

Advancing to step 2:
When dividing 42 by 78, we get 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Grab the next digit (1) from the dividend, add it to 42, then carry on: 421 / 78

Going ahead to step 3:
421 divided by 78 is 5 with a remainder of 31.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we take 390 away from 421, we end up with 31.
Take the next digit (1) from the dividend and append it to 31, then repeat: 311 / 78

Advancing to step 4:
When dividing 311 by 78, we get 3 with a remainder of 77.
Write down 3 as next digit of the result. 
Result so far: 53.0
If we subtract 234 from 311, we get 77.
Fetch the next digit (2) from the dividend, attach it to 77 and continue: 772 / 78

On to step 5:
When dividing 772 by 78, we get 9 with a remainder of 70.
Use 9 as the next digit of our solution. 
Result so far: 539.0
If we take 702 away from 772, we end up with 70.
Append the next digit (4) from the dividend to 70 and continue with: 704 / 78

Let's proceed to step 6:
When dividing 704 by 78, we get 9 with a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 5399.0
If we subtract 702 from 704, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
78 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 5399.0
Deduct 0 from 20 and we're left 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.

Let's proceed to step 8:
78 can be fit into 200 2 times, resulting in a remainder of 44.
The next digit of our result is 2. 
Result so far: 5399.02
Subtract 156 from 200 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Moving on to step 9:
78 can be fit into 440 5 times, resulting in a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 5399.025
Subtract 390 from 440 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 10:
The number 78 fits into 500 6 times, leaving a remainder of 32.
The number 6 becomes the next digit in our result. 
Result so far: 5399.0256
The remainder is 32 after subtracting 468 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 11:
78 goes into 320 4 times with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 5399.02564
Subtracting 312 from 320 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 12:
80 divided by 78 is 1 with a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 5399.025641
If we subtract 78 from 80, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 13:
20 divided by 78 is 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 5399.025641
Deduct 0 from 20 and we're left 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.

Let's proceed to step 14:
78 can be fit into 200 2 times, resulting in a remainder of 44.
The next digit of our result is 2. 
Result so far: 5399.02564102
If we take 156 away from 200, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The quotient of the division is 5399.02564102, and the remainder is 4.4e-08.