We look at the division of 16293521 by 4 
We want to divide 16293521 by 4.

Step 1:
If we divide 1 by 4, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 4

Let's proceed to step 2:
4 can be fit into 16 4 times, resulting in a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 16 away from 16, we end up with 0.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 4

Let's proceed to step 3:
The number 4 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
Subtracting 0 from 2 leaves us with 2.
Include the next digit (9) from the dividend after 2, then repeat: 29 / 4

Step 4:
4 can be fit into 29 7 times, resulting in a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 407.0
Subtracting 28 from 29 leaves us with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 4

Step 5:
When dividing 13 by 4, we get 3 with a remainder of 1.
The next digit of our result is 3. 
Result so far: 4073.0
Subtract 12 from 13 to get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 4

Moving on to step 6:
4 goes into 15 3 times with a remainder of 3.
The next digit of our result is 3. 
Result so far: 40733.0
The remainder is 3 after subtracting 12 from 15.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 4

Step 7:
32 divided by 4 is 8 with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 407338.0
If we subtract 32 from 32, we get 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 4

Step 8:
1 divided by 4 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 4073380.0
Subtracting 0 from 1 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.

Moving on to step 9:
4 can be fit into 10 2 times, resulting in a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 4073380.2
Deduct 8 from 10 and we're left 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.

Going ahead to step 10:
4 can be fit into 20 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 4073380.25
Deduct 20 from 20 and we're left 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.

Advancing to step 11:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 4073380.25
The remainder is 0 after subtracting 0 from 0.
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 12:
4 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 4073380.25
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.

The final result is 4073380.25 with a remainder of 0.0.