We look at the division of 45291482 by 643 
Our goal is to divide 45291482 by 643.

Going ahead to step 1:
643 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 643

Step 2:
When dividing 45 by 643, we get 0 with a remainder of 45.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 45 after subtracting 0 from 45.
Bring next digit (2) of the dividend behind the 45 and repeat the process: 452 / 643

Advancing to step 3:
The number 643 fits into 452 0 times, leaving a remainder of 452.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 452 after subtracting 0 from 452.
Include the next digit (9) from the dividend after 452, then repeat: 4529 / 643

On to step 4:
If we divide 4529 by 643, we get 7 and a remainder of 28.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Deduct 4501 from 4529 and we're left with 28.
Append the next digit (1) from the dividend to 28 and continue with: 281 / 643

Let's proceed to step 5:
281 divided by 643 is 0 with a remainder of 281.
The next digit of our result is 0. 
Result so far: 70.0
If we subtract 0 from 281, we get 281.
Append the next digit (4) from the dividend to 281 and continue with: 2814 / 643

Moving on to step 6:
The number 643 fits into 2814 4 times, leaving a remainder of 242.
Put 4 as the next digit of the answer. 
Result so far: 704.0
Subtract 2572 from 2814 to get 242.
Bring next digit (8) of the dividend behind the 242 and repeat the process: 2428 / 643

On to step 7:
2428 divided by 643 is 3 with a remainder of 499.
Put 3 as the next digit of the answer. 
Result so far: 7043.0
If we subtract 1929 from 2428, we get 499.
Grab the next digit (2) from the dividend, add it to 499, then carry on: 4992 / 643

Let's proceed to step 8:
4992 divided by 643 is 7 with a remainder of 491.
The next digit of our result is 7. 
Result so far: 70437.0
If we take 4501 away from 4992, we end up with 491.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4910, and continue the process.

Going ahead to step 9:
The number 643 fits into 4910 7 times, leaving a remainder of 409.
Put 7 as the next digit of the answer. 
Result so far: 70437.7
If we take 4501 away from 4910, we end up with 409.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4090, and continue the process.

Let's proceed to step 10:
4090 divided by 643 is 6 with a remainder of 232.
Use 6 as the next digit of our solution. 
Result so far: 70437.76
Subtract 3858 from 4090 to get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Advancing to step 11:
When dividing 2320 by 643, we get 3 with a remainder of 391.
Use 3 as the next digit of our solution. 
Result so far: 70437.763
Subtracting 1929 from 2320 leaves us with 391.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3910, and continue the process.

Moving on to step 12:
3910 divided by 643 is 6 with a remainder of 52.
The number 6 becomes the next digit in our result. 
Result so far: 70437.7636
Subtracting 3858 from 3910 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 13:
If we divide 520 by 643, we get 0 and a remainder of 520.
Record the quotient 0 as the next digit in the result. 
Result so far: 70437.7636
Deduct 0 from 520 and we're left with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

On to step 14:
643 goes into 5200 8 times with a remainder of 56.
The next digit of our result is 8. 
Result so far: 70437.763608
If we subtract 5144 from 5200, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 15:
When dividing 560 by 643, we get 0 with a remainder of 560.
The number 0 becomes the next digit in our result. 
Result so far: 70437.763608
The remainder is 560 after subtracting 0 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Moving on to step 16:
5600 divided by 643 is 8 with a remainder of 456.
Use 8 as the next digit of our solution. 
Result so far: 70437.76360808
The remainder is 456 after subtracting 5144 from 5600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

In conclusion, the division gives 70437.76360808 with a balance of 4.56e-07.