645958 divided by 53 
Let's see how many times 53 fits into 645958.

Step 1:
53 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
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 / 53

Let's proceed to step 2:
When dividing 64 by 53, we get 1 with a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 53 from 64 and we're left with 11.
Grab the next digit (5) from the dividend, add it to 11, then carry on: 115 / 53

Going ahead to step 3:
The number 53 fits into 115 2 times, leaving a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we subtract 106 from 115, we get 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 53

Let's proceed to step 4:
99 divided by 53 is 1 with a remainder of 46.
Record the quotient 1 as the next digit in the result. 
Result so far: 121.0
Subtracting 53 from 99 leaves us with 46.
Append the next digit (5) from the dividend to 46 and continue with: 465 / 53

Step 5:
465 divided by 53 is 8 with a remainder of 41.
The next digit of our result is 8. 
Result so far: 1218.0
If we subtract 424 from 465, we get 41.
Include the next digit (8) from the dividend after 41, then repeat: 418 / 53

Step 6:
If we divide 418 by 53, we get 7 and a remainder of 47.
The next digit of our result is 7. 
Result so far: 12187.0
If we subtract 371 from 418, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 7:
If we divide 470 by 53, we get 8 and a remainder of 46.
The next digit of our result is 8. 
Result so far: 12187.8
Deduct 424 from 470 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 8:
When dividing 460 by 53, we get 8 with a remainder of 36.
Record the quotient 8 as the next digit in the result. 
Result so far: 12187.88
The remainder is 36 after subtracting 424 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Our division results in 12187.88 with a remaining 0.036.