We look at the division of 64093198 by 646 
We want to divide 64093198 by 646.

Moving on to step 1:
646 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 646

On to step 2:
646 goes into 64 0 times with a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Append the next digit (0) from the dividend to 64 and continue with: 640 / 646

Advancing to step 3:
The number 646 fits into 640 0 times, leaving a remainder of 640.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 640, we get 640.
Append the next digit (9) from the dividend to 640 and continue with: 6409 / 646

Let's proceed to step 4:
When dividing 6409 by 646, we get 9 with a remainder of 595.
The next digit of our result is 9. 
Result so far: 9.0
Deduct 5814 from 6409 and we're left with 595.
Grab the next digit (3) from the dividend, add it to 595, then carry on: 5953 / 646

Advancing to step 5:
646 goes into 5953 9 times with a remainder of 139.
Record the quotient 9 as the next digit in the result. 
Result so far: 99.0
Deduct 5814 from 5953 and we're left with 139.
Fetch the next digit (1) from the dividend, attach it to 139 and continue: 1391 / 646

On to step 6:
646 goes into 1391 2 times with a remainder of 99.
Put 2 as the next digit of the answer. 
Result so far: 992.0
If we subtract 1292 from 1391, we get 99.
Take the next digit (9) from the dividend and append it to 99, then repeat: 999 / 646

Let's proceed to step 7:
646 can be fit into 999 1 times, resulting in a remainder of 353.
Record the quotient 1 as the next digit in the result. 
Result so far: 9921.0
If we subtract 646 from 999, we get 353.
Include the next digit (8) from the dividend after 353, then repeat: 3538 / 646

On to step 8:
The number 646 fits into 3538 5 times, leaving a remainder of 308.
Record the quotient 5 as the next digit in the result. 
Result so far: 99215.0
Subtract 3230 from 3538 to get 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Moving on to step 9:
When dividing 3080 by 646, we get 4 with a remainder of 496.
Put 4 as the next digit of the answer. 
Result so far: 99215.4
Subtract 2584 from 3080 to get 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Moving on to step 10:
When dividing 4960 by 646, we get 7 with a remainder of 438.
Write down 7 as next digit of the result. 
Result so far: 99215.47
Subtracting 4522 from 4960 leaves us with 438.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

Advancing to step 11:
The number 646 fits into 4380 6 times, leaving a remainder of 504.
Record the quotient 6 as the next digit in the result. 
Result so far: 99215.476
Subtract 3876 from 4380 to get 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

Step 12:
The number 646 fits into 5040 7 times, leaving a remainder of 518.
Put 7 as the next digit of the answer. 
Result so far: 99215.4767
If we subtract 4522 from 5040, we get 518.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

Advancing to step 13:
When dividing 5180 by 646, we get 8 with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 99215.47678
If we subtract 5168 from 5180, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 14:
646 can be fit into 120 0 times, resulting in a remainder of 120.
Record the quotient 0 as the next digit in the result. 
Result so far: 99215.47678
Deduct 0 from 120 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Let's proceed to step 15:
1200 divided by 646 is 1 with a remainder of 554.
The next digit of our result is 1. 
Result so far: 99215.4767801
The remainder is 554 after subtracting 646 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5540, and continue the process.

Going ahead to step 16:
646 goes into 5540 8 times with a remainder of 372.
The next digit of our result is 8. 
Result so far: 99215.47678018
Subtract 5168 from 5540 to get 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

The final result is 99215.47678018 with a remainder of 3.72e-07.