31241336 ÷ 243 
Let's see how many times 243 fits into 31241336.

Step 1:
When dividing 3 by 243, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 243

Advancing to step 2:
31 divided by 243 is 0 with a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 31 to get 31.
Grab the next digit (2) from the dividend, add it to 31, then carry on: 312 / 243

On to step 3:
When dividing 312 by 243, we get 1 with a remainder of 69.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 243 from 312 leaves us with 69.
Take the next digit (4) from the dividend and append it to 69, then repeat: 694 / 243

Moving on to step 4:
The number 243 fits into 694 2 times, leaving a remainder of 208.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we subtract 486 from 694, we get 208.
Bring next digit (1) of the dividend behind the 208 and repeat the process: 2081 / 243

Advancing to step 5:
243 goes into 2081 8 times with a remainder of 137.
Put 8 as the next digit of the answer. 
Result so far: 128.0
Subtract 1944 from 2081 to get 137.
Take the next digit (3) from the dividend and append it to 137, then repeat: 1373 / 243

Advancing to step 6:
The number 243 fits into 1373 5 times, leaving a remainder of 158.
Use 5 as the next digit of our solution. 
Result so far: 1285.0
Subtracting 1215 from 1373 leaves us with 158.
Grab the next digit (3) from the dividend, add it to 158, then carry on: 1583 / 243

Let's proceed to step 7:
1583 divided by 243 is 6 with a remainder of 125.
The next digit of our result is 6. 
Result so far: 12856.0
If we subtract 1458 from 1583, we get 125.
Fetch the next digit (6) from the dividend, attach it to 125 and continue: 1256 / 243

On to step 8:
When dividing 1256 by 243, we get 5 with a remainder of 41.
The number 5 becomes the next digit in our result. 
Result so far: 128565.0
The remainder is 41 after subtracting 1215 from 1256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 9:
243 can be fit into 410 1 times, resulting in a remainder of 167.
The next digit of our result is 1. 
Result so far: 128565.1
If we take 243 away from 410, we end up with 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 10:
The number 243 fits into 1670 6 times, leaving a remainder of 212.
The next digit of our result is 6. 
Result so far: 128565.16
If we subtract 1458 from 1670, we get 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Moving on to step 11:
If we divide 2120 by 243, we get 8 and a remainder of 176.
Put 8 as the next digit of the answer. 
Result so far: 128565.168
Deduct 1944 from 2120 and we're left with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

On to step 12:
243 goes into 1760 7 times with a remainder of 59.
The next digit of our result is 7. 
Result so far: 128565.1687
Subtracting 1701 from 1760 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Let's proceed to step 13:
590 divided by 243 is 2 with a remainder of 104.
Record the quotient 2 as the next digit in the result. 
Result so far: 128565.16872
The remainder is 104 after subtracting 486 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

On to step 14:
If we divide 1040 by 243, we get 4 and a remainder of 68.
Put 4 as the next digit of the answer. 
Result so far: 128565.168724
Subtracting 972 from 1040 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 15:
When dividing 680 by 243, we get 2 with a remainder of 194.
Use 2 as the next digit of our solution. 
Result so far: 128565.1687242
The remainder is 194 after subtracting 486 from 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Moving on to step 16:
1940 divided by 243 is 7 with a remainder of 239.
The number 7 becomes the next digit in our result. 
Result so far: 128565.16872427
Deduct 1701 from 1940 and we're left with 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

The final outcome is 128565.16872427, with a leftover of 2.39e-07.