53506913 ÷ 243 
Our goal is to divide 53506913 by 243.

Step 1:
If we divide 5 by 243, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 243

Going ahead to step 2:
53 divided by 243 is 0 with a remainder of 53.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 53, we get 53.
Grab the next digit (5) from the dividend, add it to 53, then carry on: 535 / 243

Advancing to step 3:
243 can be fit into 535 2 times, resulting in a remainder of 49.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 486 from 535, we get 49.
Bring next digit (0) of the dividend behind the 49 and repeat the process: 490 / 243

Step 4:
The number 243 fits into 490 2 times, leaving a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 22.0
Subtracting 486 from 490 leaves us with 4.
Grab the next digit (6) from the dividend, add it to 4, then carry on: 46 / 243

Moving on to step 5:
243 goes into 46 0 times with a remainder of 46.
The number 0 becomes the next digit in our result. 
Result so far: 220.0
If we take 0 away from 46, we end up with 46.
Include the next digit (9) from the dividend after 46, then repeat: 469 / 243

Going ahead to step 6:
243 can be fit into 469 1 times, resulting in a remainder of 226.
The next digit of our result is 1. 
Result so far: 2201.0
Subtract 243 from 469 to get 226.
Include the next digit (1) from the dividend after 226, then repeat: 2261 / 243

Moving on to step 7:
If we divide 2261 by 243, we get 9 and a remainder of 74.
Record the quotient 9 as the next digit in the result. 
Result so far: 22019.0
Deduct 2187 from 2261 and we're left with 74.
Fetch the next digit (3) from the dividend, attach it to 74 and continue: 743 / 243

Advancing to step 8:
If we divide 743 by 243, we get 3 and a remainder of 14.
Use 3 as the next digit of our solution. 
Result so far: 220193.0
The remainder is 14 after subtracting 729 from 743.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 9:
If we divide 140 by 243, we get 0 and a remainder of 140.
The next digit of our result is 0. 
Result so far: 220193.0
If we take 0 away from 140, we end up with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Let's proceed to step 10:
1400 divided by 243 is 5 with a remainder of 185.
Use 5 as the next digit of our solution. 
Result so far: 220193.05
Subtract 1215 from 1400 to get 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Step 11:
When dividing 1850 by 243, we get 7 with a remainder of 149.
Record the quotient 7 as the next digit in the result. 
Result so far: 220193.057
If we subtract 1701 from 1850, we get 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

On to step 12:
If we divide 1490 by 243, we get 6 and a remainder of 32.
Use 6 as the next digit of our solution. 
Result so far: 220193.0576
The remainder is 32 after subtracting 1458 from 1490.
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 13:
The number 243 fits into 320 1 times, leaving a remainder of 77.
Put 1 as the next digit of the answer. 
Result so far: 220193.05761
Deduct 243 from 320 and we're left with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Let's proceed to step 14:
The number 243 fits into 770 3 times, leaving a remainder of 41.
The number 3 becomes the next digit in our result. 
Result so far: 220193.057613
If we subtract 729 from 770, we get 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Let's proceed to step 15:
The number 243 fits into 410 1 times, leaving a remainder of 167.
Record the quotient 1 as the next digit in the result. 
Result so far: 220193.0576131
If we subtract 243 from 410, we get 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

Let's proceed to step 16:
The number 243 fits into 1670 6 times, leaving a remainder of 212.
Use 6 as the next digit of our solution. 
Result so far: 220193.05761316
Subtracting 1458 from 1670 leaves us with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

The quotient of the division is 220193.05761316, and the remainder is 2.12e-07.