53381355 ÷ 803 
We're looking to find how many times 803 goes into 53381355.

Going ahead to step 1:
803 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 803

Step 2:
When dividing 53 by 803, we get 0 with a remainder of 53.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 53, we get 53.
Grab the next digit (3) from the dividend, add it to 53, then carry on: 533 / 803

Going ahead to step 3:
533 divided by 803 is 0 with a remainder of 533.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 533 to get 533.
Append the next digit (8) from the dividend to 533 and continue with: 5338 / 803

Step 4:
803 can be fit into 5338 6 times, resulting in a remainder of 520.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we take 4818 away from 5338, we end up with 520.
Bring next digit (1) of the dividend behind the 520 and repeat the process: 5201 / 803

On to step 5:
803 goes into 5201 6 times with a remainder of 383.
Use 6 as the next digit of our solution. 
Result so far: 66.0
Subtract 4818 from 5201 to get 383.
Fetch the next digit (3) from the dividend, attach it to 383 and continue: 3833 / 803

Advancing to step 6:
If we divide 3833 by 803, we get 4 and a remainder of 621.
The next digit of our result is 4. 
Result so far: 664.0
If we subtract 3212 from 3833, we get 621.
Append the next digit (5) from the dividend to 621 and continue with: 6215 / 803

Going ahead to step 7:
803 goes into 6215 7 times with a remainder of 594.
The next digit of our result is 7. 
Result so far: 6647.0
If we take 5621 away from 6215, we end up with 594.
Fetch the next digit (5) from the dividend, attach it to 594 and continue: 5945 / 803

Moving on to step 8:
803 goes into 5945 7 times with a remainder of 324.
Use 7 as the next digit of our solution. 
Result so far: 66477.0
If we subtract 5621 from 5945, we get 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Moving on to step 9:
803 goes into 3240 4 times with a remainder of 28.
Put 4 as the next digit of the answer. 
Result so far: 66477.4
Deduct 3212 from 3240 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 10:
803 can be fit into 280 0 times, resulting in a remainder of 280.
Use 0 as the next digit of our solution. 
Result so far: 66477.4
If we take 0 away from 280, we end up with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Going ahead to step 11:
When dividing 2800 by 803, we get 3 with a remainder of 391.
The next digit of our result is 3. 
Result so far: 66477.403
Deduct 2409 from 2800 and we're left 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.

Going ahead to step 12:
The number 803 fits into 3910 4 times, leaving a remainder of 698.
The number 4 becomes the next digit in our result. 
Result so far: 66477.4034
The remainder is 698 after subtracting 3212 from 3910.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6980, and continue the process.

Let's proceed to step 13:
The number 803 fits into 6980 8 times, leaving a remainder of 556.
Write down 8 as next digit of the result. 
Result so far: 66477.40348
If we take 6424 away from 6980, we end up with 556.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5560, and continue the process.

Advancing to step 14:
803 goes into 5560 6 times with a remainder of 742.
The number 6 becomes the next digit in our result. 
Result so far: 66477.403486
Subtract 4818 from 5560 to get 742.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7420, and continue the process.

Going ahead to step 15:
The number 803 fits into 7420 9 times, leaving a remainder of 193.
Record the quotient 9 as the next digit in the result. 
Result so far: 66477.4034869
If we take 7227 away from 7420, we end up with 193.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1930, and continue the process.

Step 16:
The number 803 fits into 1930 2 times, leaving a remainder of 324.
The next digit of our result is 2. 
Result so far: 66477.40348692
The remainder is 324 after subtracting 1606 from 1930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

After the division, we end up with 66477.40348692 and a remainder of 3.24e-07.