81593313 ÷ 351 
We want to divide 81593313 by 351.

Step 1:
When dividing 8 by 351, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 351

Moving on to step 2:
351 goes into 81 0 times with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Include the next digit (5) from the dividend after 81, then repeat: 815 / 351

On to step 3:
The number 351 fits into 815 2 times, leaving a remainder of 113.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 702 from 815 to get 113.
Grab the next digit (9) from the dividend, add it to 113, then carry on: 1139 / 351

Moving on to step 4:
When dividing 1139 by 351, we get 3 with a remainder of 86.
The next digit of our result is 3. 
Result so far: 23.0
Subtracting 1053 from 1139 leaves us with 86.
Bring next digit (3) of the dividend behind the 86 and repeat the process: 863 / 351

Moving on to step 5:
863 divided by 351 is 2 with a remainder of 161.
Put 2 as the next digit of the answer. 
Result so far: 232.0
Deduct 702 from 863 and we're left with 161.
Grab the next digit (3) from the dividend, add it to 161, then carry on: 1613 / 351

Advancing to step 6:
1613 divided by 351 is 4 with a remainder of 209.
Write down 4 as next digit of the result. 
Result so far: 2324.0
If we subtract 1404 from 1613, we get 209.
Take the next digit (1) from the dividend and append it to 209, then repeat: 2091 / 351

Step 7:
When dividing 2091 by 351, we get 5 with a remainder of 336.
The number 5 becomes the next digit in our result. 
Result so far: 23245.0
If we subtract 1755 from 2091, we get 336.
Bring next digit (3) of the dividend behind the 336 and repeat the process: 3363 / 351

Advancing to step 8:
351 goes into 3363 9 times with a remainder of 204.
Use 9 as the next digit of our solution. 
Result so far: 232459.0
If we take 3159 away from 3363, we end up with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

On to step 9:
351 goes into 2040 5 times with a remainder of 285.
Record the quotient 5 as the next digit in the result. 
Result so far: 232459.5
Subtract 1755 from 2040 to get 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

On to step 10:
351 can be fit into 2850 8 times, resulting in a remainder of 42.
The next digit of our result is 8. 
Result so far: 232459.58
Subtract 2808 from 2850 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Step 11:
351 goes into 420 1 times with a remainder of 69.
Use 1 as the next digit of our solution. 
Result so far: 232459.581
If we subtract 351 from 420, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Step 12:
351 goes into 690 1 times with a remainder of 339.
The next digit of our result is 1. 
Result so far: 232459.5811
Subtract 351 from 690 to get 339.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3390, and continue the process.

The quotient of the division is 232459.5811, and the remainder is 0.00339.