53278621 ÷ 4 
Our goal is to divide 53278621 by 4.

Going ahead to step 1:
When dividing 5 by 4, we get 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 4 away from 5, we end up with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 4

Step 2:
If we divide 13 by 4, we get 3 and a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 13.0
If we take 12 away from 13, we end up with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 4

Let's proceed to step 3:
When dividing 12 by 4, we get 3 with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 133.0
Deduct 12 from 12 and we're left with 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 4

Moving on to step 4:
When dividing 7 by 4, we get 1 with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 1331.0
If we take 4 away from 7, we end up with 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 4

Advancing to step 5:
4 goes into 38 9 times with a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 13319.0
Deduct 36 from 38 and we're left with 2.
Bring next digit (6) of the dividend behind the 2 and repeat the process: 26 / 4

Let's proceed to step 6:
4 goes into 26 6 times with a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 133196.0
If we subtract 24 from 26, we get 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 4

Moving on to step 7:
When dividing 22 by 4, we get 5 with a remainder of 2.
The number 5 becomes the next digit in our result. 
Result so far: 1331965.0
The remainder is 2 after subtracting 20 from 22.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 4

Step 8:
If we divide 21 by 4, we get 5 and a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 13319655.0
Subtracting 20 from 21 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 9:
If we divide 10 by 4, we get 2 and a remainder of 2.
The next digit of our result is 2. 
Result so far: 13319655.2
Subtract 8 from 10 to 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.

Moving on to step 10:
The number 4 fits into 20 5 times, leaving a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 13319655.25
The remainder is 0 after subtracting 20 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 11:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 13319655.25
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 12:
If we divide 0 by 4, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 13319655.25
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 13319655.25 and a remainder of 0.0.