99879172 ÷ 64 
We want to divide 99879172 by 64.

On to step 1:
When dividing 9 by 64, we get 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 64

On to step 2:
When dividing 99 by 64, we get 1 with a remainder of 35.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 64 from 99 leaves us with 35.
Grab the next digit (8) from the dividend, add it to 35, then carry on: 358 / 64

Going ahead to step 3:
358 divided by 64 is 5 with a remainder of 38.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Subtract 320 from 358 to get 38.
Take the next digit (7) from the dividend and append it to 38, then repeat: 387 / 64

Let's proceed to step 4:
387 divided by 64 is 6 with a remainder of 3.
The next digit of our result is 6. 
Result so far: 156.0
Deduct 384 from 387 and we're left with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 64

Step 5:
If we divide 39 by 64, we get 0 and a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 1560.0
If we take 0 away from 39, we end up with 39.
Append the next digit (1) from the dividend to 39 and continue with: 391 / 64

Moving on to step 6:
If we divide 391 by 64, we get 6 and a remainder of 7.
Record the quotient 6 as the next digit in the result. 
Result so far: 15606.0
Subtracting 384 from 391 leaves us with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 64

Moving on to step 7:
The number 64 fits into 77 1 times, leaving a remainder of 13.
The next digit of our result is 1. 
Result so far: 156061.0
Subtract 64 from 77 to get 13.
Grab the next digit (2) from the dividend, add it to 13, then carry on: 132 / 64

Step 8:
The number 64 fits into 132 2 times, leaving a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 1560612.0
Deduct 128 from 132 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
40 divided by 64 is 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 1560612.0
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 10:
When dividing 400 by 64, we get 6 with a remainder of 16.
The next digit of our result is 6. 
Result so far: 1560612.06
Subtracting 384 from 400 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 11:
The number 64 fits into 160 2 times, leaving a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 1560612.062
If we subtract 128 from 160, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 12:
The number 64 fits into 320 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 1560612.0625
Subtract 320 from 320 to 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.

Going ahead to step 13:
The number 64 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1560612.0625
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.

Moving on to step 14:
0 divided by 64 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 1560612.0625
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.

The quotient of the division is 1560612.0625, and the remainder is 0.0.