643487 ÷ 54 
We're looking to find how many times 54 goes into 643487.

Moving on to step 1:
The number 54 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 54

Moving on to step 2:
54 goes into 64 1 times with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 10 after subtracting 54 from 64.
Take the next digit (3) from the dividend and append it to 10, then repeat: 103 / 54

Going ahead to step 3:
When dividing 103 by 54, we get 1 with a remainder of 49.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtract 54 from 103 to get 49.
Fetch the next digit (4) from the dividend, attach it to 49 and continue: 494 / 54

Let's proceed to step 4:
The number 54 fits into 494 9 times, leaving a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 119.0
If we subtract 486 from 494, we get 8.
Fetch the next digit (8) from the dividend, attach it to 8 and continue: 88 / 54

Advancing to step 5:
54 goes into 88 1 times with a remainder of 34.
Record the quotient 1 as the next digit in the result. 
Result so far: 1191.0
Subtract 54 from 88 to get 34.
Take the next digit (7) from the dividend and append it to 34, then repeat: 347 / 54

Let's proceed to step 6:
When dividing 347 by 54, we get 6 with a remainder of 23.
Use 6 as the next digit of our solution. 
Result so far: 11916.0
Subtract 324 from 347 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 7:
When dividing 230 by 54, we get 4 with a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 11916.4
If we subtract 216 from 230, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 8:
140 divided by 54 is 2 with a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 11916.42
Deduct 108 from 140 and we're left 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.

Going ahead to step 9:
54 can be fit into 320 5 times, resulting in a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 11916.425
If we take 270 away from 320, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 10:
54 can be fit into 500 9 times, resulting in a remainder of 14.
Use 9 as the next digit of our solution. 
Result so far: 11916.4259
The remainder is 14 after subtracting 486 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 11:
When dividing 140 by 54, we get 2 with a remainder of 32.
Put 2 as the next digit of the answer. 
Result so far: 11916.42592
If we subtract 108 from 140, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 12:
When dividing 320 by 54, we get 5 with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 11916.425925
If we subtract 270 from 320, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 13:
54 goes into 500 9 times with a remainder of 14.
Use 9 as the next digit of our solution. 
Result so far: 11916.4259259
Deduct 486 from 500 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 14:
The number 54 fits into 140 2 times, leaving a remainder of 32.
The number 2 becomes the next digit in our result. 
Result so far: 11916.42592592
If we subtract 108 from 140, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

After the division, we end up with 11916.42592592 and a remainder of 3.2e-08.