79900104 ÷ 64 
We want to figure out the number of times 79900104 can be divided by 64.

Moving on to step 1:
64 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 64

Moving on to step 2:
The number 64 fits into 79 1 times, leaving a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 64 away from 79, we end up with 15.
Bring next digit (9) of the dividend behind the 15 and repeat the process: 159 / 64

On to step 3:
64 can be fit into 159 2 times, resulting in a remainder of 31.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we subtract 128 from 159, we get 31.
Take the next digit (0) from the dividend and append it to 31, then repeat: 310 / 64

Going ahead to step 4:
If we divide 310 by 64, we get 4 and a remainder of 54.
Write down 4 as next digit of the result. 
Result so far: 124.0
Subtract 256 from 310 to get 54.
Take the next digit (0) from the dividend and append it to 54, then repeat: 540 / 64

Moving on to step 5:
64 goes into 540 8 times with a remainder of 28.
The next digit of our result is 8. 
Result so far: 1248.0
Subtract 512 from 540 to get 28.
Include the next digit (1) from the dividend after 28, then repeat: 281 / 64

Going ahead to step 6:
When dividing 281 by 64, we get 4 with a remainder of 25.
Write down 4 as next digit of the result. 
Result so far: 12484.0
If we take 256 away from 281, we end up with 25.
Take the next digit (0) from the dividend and append it to 25, then repeat: 250 / 64

Step 7:
When dividing 250 by 64, we get 3 with a remainder of 58.
Write down 3 as next digit of the result. 
Result so far: 124843.0
If we take 192 away from 250, we end up with 58.
Bring next digit (4) of the dividend behind the 58 and repeat the process: 584 / 64

Step 8:
If we divide 584 by 64, we get 9 and a remainder of 8.
The number 9 becomes the next digit in our result. 
Result so far: 1248439.0
If we take 576 away from 584, we end up 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.

Going ahead to step 9:
64 goes into 80 1 times with a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 1248439.1
Subtracting 64 from 80 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.

On to step 10:
64 goes into 160 2 times with a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 1248439.12
Subtract 128 from 160 to 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.

Step 11:
The number 64 fits into 320 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 1248439.125
Deduct 320 from 320 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.

Moving on to step 12:
If we divide 0 by 64, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 1248439.125
If we take 0 away from 0, we end up 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.

Step 13:
When dividing 0 by 64, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 1248439.125
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.

Our division results in 1248439.125 with a remaining 0.0.