42553498 divided by 864 
We want to figure out the number of times 42553498 can be divided by 864.

Advancing to step 1:
When dividing 4 by 864, we get 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 864

Advancing to step 2:
When dividing 42 by 864, we get 0 with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Take the next digit (5) from the dividend and append it to 42, then repeat: 425 / 864

Moving on to step 3:
425 divided by 864 is 0 with a remainder of 425.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 425 to get 425.
Append the next digit (5) from the dividend to 425 and continue with: 4255 / 864

Let's proceed to step 4:
If we divide 4255 by 864, we get 4 and a remainder of 799.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 3456 from 4255 to get 799.
Append the next digit (3) from the dividend to 799 and continue with: 7993 / 864

Advancing to step 5:
7993 divided by 864 is 9 with a remainder of 217.
The number 9 becomes the next digit in our result. 
Result so far: 49.0
The remainder is 217 after subtracting 7776 from 7993.
Grab the next digit (4) from the dividend, add it to 217, then carry on: 2174 / 864

Moving on to step 6:
If we divide 2174 by 864, we get 2 and a remainder of 446.
Record the quotient 2 as the next digit in the result. 
Result so far: 492.0
If we subtract 1728 from 2174, we get 446.
Append the next digit (9) from the dividend to 446 and continue with: 4469 / 864

Let's proceed to step 7:
When dividing 4469 by 864, we get 5 with a remainder of 149.
Use 5 as the next digit of our solution. 
Result so far: 4925.0
Deduct 4320 from 4469 and we're left with 149.
Append the next digit (8) from the dividend to 149 and continue with: 1498 / 864

Moving on to step 8:
If we divide 1498 by 864, we get 1 and a remainder of 634.
Record the quotient 1 as the next digit in the result. 
Result so far: 49251.0
The remainder is 634 after subtracting 864 from 1498.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6340, and continue the process.

Let's proceed to step 9:
If we divide 6340 by 864, we get 7 and a remainder of 292.
Write down 7 as next digit of the result. 
Result so far: 49251.7
If we take 6048 away from 6340, we end up with 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Moving on to step 10:
864 can be fit into 2920 3 times, resulting in a remainder of 328.
The number 3 becomes the next digit in our result. 
Result so far: 49251.73
If we subtract 2592 from 2920, we get 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

On to step 11:
When dividing 3280 by 864, we get 3 with a remainder of 688.
The next digit of our result is 3. 
Result so far: 49251.733
Deduct 2592 from 3280 and we're left with 688.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6880, and continue the process.

Our division results in 49251.733 with a remaining 0.0688.