We're dividing 667421 by 64 
Let's see how many times 64 fits into 667421.

Step 1:
If we divide 6 by 64, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 64

Moving on to step 2:
64 can be fit into 66 1 times, resulting in a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 2 after subtracting 64 from 66.
Append the next digit (7) from the dividend to 2 and continue with: 27 / 64

On to step 3:
When dividing 27 by 64, we get 0 with a remainder of 27.
Write down 0 as next digit of the result. 
Result so far: 10.0
Subtract 0 from 27 to get 27.
Bring next digit (4) of the dividend behind the 27 and repeat the process: 274 / 64

On to step 4:
If we divide 274 by 64, we get 4 and a remainder of 18.
The next digit of our result is 4. 
Result so far: 104.0
Deduct 256 from 274 and we're left with 18.
Bring next digit (2) of the dividend behind the 18 and repeat the process: 182 / 64

Advancing to step 5:
64 can be fit into 182 2 times, resulting in a remainder of 54.
Record the quotient 2 as the next digit in the result. 
Result so far: 1042.0
Deduct 128 from 182 and we're left with 54.
Bring next digit (1) of the dividend behind the 54 and repeat the process: 541 / 64

On to step 6:
The number 64 fits into 541 8 times, leaving a remainder of 29.
Write down 8 as next digit of the result. 
Result so far: 10428.0
If we subtract 512 from 541, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 7:
64 goes into 290 4 times with a remainder of 34.
The number 4 becomes the next digit in our result. 
Result so far: 10428.4
The remainder is 34 after subtracting 256 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 8:
340 divided by 64 is 5 with a remainder of 20.
The next digit of our result is 5. 
Result so far: 10428.45
If we take 320 away from 340, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 9:
64 goes into 200 3 times with a remainder of 8.
Write down 3 as next digit of the result. 
Result so far: 10428.453
If we take 192 away from 200, 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 10:
80 divided by 64 is 1 with a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 10428.4531
Subtract 64 from 80 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 11:
When dividing 160 by 64, we get 2 with a remainder of 32.
The next digit of our result is 2. 
Result so far: 10428.45312
If we take 128 away from 160, 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.

Step 12:
64 goes into 320 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 10428.453125
If we subtract 320 from 320, 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 13:
If we divide 0 by 64, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 10428.453125
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 14:
64 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10428.453125
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.

Our division results in 10428.453125 with a remaining 0.0.