20154452 ÷ 643 
We want to divide 20154452 by 643.

Going ahead to step 1:
When dividing 2 by 643, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 643

On to step 2:
If we divide 20 by 643, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 20 after subtracting 0 from 20.
Grab the next digit (1) from the dividend, add it to 20, then carry on: 201 / 643

Going ahead to step 3:
643 goes into 201 0 times with a remainder of 201.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 201, we end up with 201.
Append the next digit (5) from the dividend to 201 and continue with: 2015 / 643

Advancing to step 4:
2015 divided by 643 is 3 with a remainder of 86.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 1929 from 2015 to get 86.
Take the next digit (4) from the dividend and append it to 86, then repeat: 864 / 643

Advancing to step 5:
864 divided by 643 is 1 with a remainder of 221.
Put 1 as the next digit of the answer. 
Result so far: 31.0
Deduct 643 from 864 and we're left with 221.
Bring next digit (4) of the dividend behind the 221 and repeat the process: 2214 / 643

Moving on to step 6:
2214 divided by 643 is 3 with a remainder of 285.
Record the quotient 3 as the next digit in the result. 
Result so far: 313.0
Subtracting 1929 from 2214 leaves us with 285.
Grab the next digit (5) from the dividend, add it to 285, then carry on: 2855 / 643

Let's proceed to step 7:
When dividing 2855 by 643, we get 4 with a remainder of 283.
Put 4 as the next digit of the answer. 
Result so far: 3134.0
Subtract 2572 from 2855 to get 283.
Bring next digit (2) of the dividend behind the 283 and repeat the process: 2832 / 643

Going ahead to step 8:
643 goes into 2832 4 times with a remainder of 260.
The number 4 becomes the next digit in our result. 
Result so far: 31344.0
Deduct 2572 from 2832 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Step 9:
If we divide 2600 by 643, we get 4 and a remainder of 28.
Put 4 as the next digit of the answer. 
Result so far: 31344.4
The remainder is 28 after subtracting 2572 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 10:
643 can be fit into 280 0 times, resulting in a remainder of 280.
Write down 0 as next digit of the result. 
Result so far: 31344.4
If we subtract 0 from 280, we get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Step 11:
2800 divided by 643 is 4 with a remainder of 228.
The number 4 becomes the next digit in our result. 
Result so far: 31344.404
If we take 2572 away from 2800, we end up with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Going ahead to step 12:
When dividing 2280 by 643, we get 3 with a remainder of 351.
Write down 3 as next digit of the result. 
Result so far: 31344.4043
If we take 1929 away from 2280, we end up with 351.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3510, and continue the process.

On to step 13:
643 can be fit into 3510 5 times, resulting in a remainder of 295.
The number 5 becomes the next digit in our result. 
Result so far: 31344.40435
The remainder is 295 after subtracting 3215 from 3510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Step 14:
643 goes into 2950 4 times with a remainder of 378.
Use 4 as the next digit of our solution. 
Result so far: 31344.404354
Subtract 2572 from 2950 to get 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Let's proceed to step 15:
643 can be fit into 3780 5 times, resulting in a remainder of 565.
Record the quotient 5 as the next digit in the result. 
Result so far: 31344.4043545
The remainder is 565 after subtracting 3215 from 3780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5650, and continue the process.

Moving on to step 16:
If we divide 5650 by 643, we get 8 and a remainder of 506.
The number 8 becomes the next digit in our result. 
Result so far: 31344.40435458
Deduct 5144 from 5650 and we're left with 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

In conclusion, the division gives 31344.40435458 with a balance of 5.06e-07.