45526193 divided by 646 
We want to figure out the number of times 45526193 can be divided by 646.

On to step 1:
4 divided by 646 is 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 646

On to step 2:
When dividing 45 by 646, we get 0 with a remainder of 45.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 45 after subtracting 0 from 45.
Fetch the next digit (5) from the dividend, attach it to 45 and continue: 455 / 646

On to step 3:
When dividing 455 by 646, we get 0 with a remainder of 455.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 455 leaves us with 455.
Grab the next digit (2) from the dividend, add it to 455, then carry on: 4552 / 646

Moving on to step 4:
646 goes into 4552 7 times with a remainder of 30.
Write down 7 as next digit of the result. 
Result so far: 7.0
Deduct 4522 from 4552 and we're left with 30.
Fetch the next digit (6) from the dividend, attach it to 30 and continue: 306 / 646

Advancing to step 5:
646 can be fit into 306 0 times, resulting in a remainder of 306.
Put 0 as the next digit of the answer. 
Result so far: 70.0
The remainder is 306 after subtracting 0 from 306.
Include the next digit (1) from the dividend after 306, then repeat: 3061 / 646

On to step 6:
646 goes into 3061 4 times with a remainder of 477.
Use 4 as the next digit of our solution. 
Result so far: 704.0
If we subtract 2584 from 3061, we get 477.
Bring next digit (9) of the dividend behind the 477 and repeat the process: 4779 / 646

Advancing to step 7:
When dividing 4779 by 646, we get 7 with a remainder of 257.
Write down 7 as next digit of the result. 
Result so far: 7047.0
Deduct 4522 from 4779 and we're left with 257.
Include the next digit (3) from the dividend after 257, then repeat: 2573 / 646

Going ahead to step 8:
When dividing 2573 by 646, we get 3 with a remainder of 635.
Write down 3 as next digit of the result. 
Result so far: 70473.0
If we take 1938 away from 2573, we end up with 635.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6350, and continue the process.

Moving on to step 9:
When dividing 6350 by 646, we get 9 with a remainder of 536.
Record the quotient 9 as the next digit in the result. 
Result so far: 70473.9
If we take 5814 away from 6350, we end up with 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Moving on to step 10:
5360 divided by 646 is 8 with a remainder of 192.
The next digit of our result is 8. 
Result so far: 70473.98
Deduct 5168 from 5360 and we're left with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Moving on to step 11:
646 goes into 1920 2 times with a remainder of 628.
The number 2 becomes the next digit in our result. 
Result so far: 70473.982
Deduct 1292 from 1920 and we're left with 628.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6280, and continue the process.

Advancing to step 12:
646 goes into 6280 9 times with a remainder of 466.
The number 9 becomes the next digit in our result. 
Result so far: 70473.9829
If we take 5814 away from 6280, we end up with 466.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

Moving on to step 13:
If we divide 4660 by 646, we get 7 and a remainder of 138.
The number 7 becomes the next digit in our result. 
Result so far: 70473.98297
Subtract 4522 from 4660 to get 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

On to step 14:
The number 646 fits into 1380 2 times, leaving a remainder of 88.
The number 2 becomes the next digit in our result. 
Result so far: 70473.982972
If we subtract 1292 from 1380, we get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Step 15:
If we divide 880 by 646, we get 1 and a remainder of 234.
Put 1 as the next digit of the answer. 
Result so far: 70473.9829721
If we take 646 away from 880, we end up with 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Step 16:
When dividing 2340 by 646, we get 3 with a remainder of 402.
The number 3 becomes the next digit in our result. 
Result so far: 70473.98297213
Subtract 1938 from 2340 to get 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

In conclusion, the division gives 70473.98297213 with a balance of 4.02e-07.