We divide 15988638 by 64
We want to divide 15988638 by 64.

Step 1:
When dividing 1 by 64, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 64

On to step 2:
64 can be fit into 15 0 times, resulting in a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 64

Step 3:
64 can be fit into 159 2 times, resulting in a remainder of 31.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 31 after subtracting 128 from 159.
Take the next digit (8) from the dividend and append it to 31, then repeat: 318 / 64

Going ahead to step 4:
64 goes into 318 4 times with a remainder of 62.
The number 4 becomes the next digit in our result. 
Result so far: 24.0
If we subtract 256 from 318, we get 62.
Fetch the next digit (8) from the dividend, attach it to 62 and continue: 628 / 64

Going ahead to step 5:
64 goes into 628 9 times with a remainder of 52.
Use 9 as the next digit of our solution. 
Result so far: 249.0
Subtract 576 from 628 to get 52.
Take the next digit (6) from the dividend and append it to 52, then repeat: 526 / 64

Going ahead to step 6:
If we divide 526 by 64, we get 8 and a remainder of 14.
Record the quotient 8 as the next digit in the result. 
Result so far: 2498.0
If we take 512 away from 526, we end up with 14.
Include the next digit (3) from the dividend after 14, then repeat: 143 / 64

Moving on to step 7:
The number 64 fits into 143 2 times, leaving a remainder of 15.
Use 2 as the next digit of our solution. 
Result so far: 24982.0
The remainder is 15 after subtracting 128 from 143.
Fetch the next digit (8) from the dividend, attach it to 15 and continue: 158 / 64

Let's proceed to step 8:
64 can be fit into 158 2 times, resulting in a remainder of 30.
Write down 2 as next digit of the result. 
Result so far: 249822.0
Subtract 128 from 158 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 9:
The number 64 fits into 300 4 times, leaving a remainder of 44.
Use 4 as the next digit of our solution. 
Result so far: 249822.4
If we take 256 away from 300, 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.

Going ahead to step 10:
If we divide 440 by 64, we get 6 and a remainder of 56.
The number 6 becomes the next digit in our result. 
Result so far: 249822.46
Subtracting 384 from 440 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 11:
64 goes into 560 8 times with a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 249822.468
Subtracting 512 from 560 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 12:
64 goes into 480 7 times with a remainder of 32.
Put 7 as the next digit of the answer. 
Result so far: 249822.4687
If we take 448 away from 480, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 13:
If we divide 320 by 64, we get 5 and a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 249822.46875
The remainder is 0 after subtracting 320 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 14:
When dividing 0 by 64, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 249822.46875
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.

On to step 15:
0 divided by 64 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 249822.46875
Deduct 0 from 0 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.

The quotient of the division is 249822.46875, and the remainder is 0.0.