80109153 ÷ 355 
We want to figure out the number of times 80109153 can be divided by 355.

On to step 1:
When dividing 8 by 355, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 355

Going ahead to step 2:
355 goes into 80 0 times with a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Take the next digit (1) from the dividend and append it to 80, then repeat: 801 / 355

Advancing to step 3:
355 goes into 801 2 times with a remainder of 91.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 710 from 801 leaves us with 91.
Grab the next digit (0) from the dividend, add it to 91, then carry on: 910 / 355

Going ahead to step 4:
When dividing 910 by 355, we get 2 with a remainder of 200.
Use 2 as the next digit of our solution. 
Result so far: 22.0
Subtracting 710 from 910 leaves us with 200.
Bring next digit (9) of the dividend behind the 200 and repeat the process: 2009 / 355

Step 5:
When dividing 2009 by 355, we get 5 with a remainder of 234.
Put 5 as the next digit of the answer. 
Result so far: 225.0
If we take 1775 away from 2009, we end up with 234.
Grab the next digit (1) from the dividend, add it to 234, then carry on: 2341 / 355

Going ahead to step 6:
If we divide 2341 by 355, we get 6 and a remainder of 211.
The number 6 becomes the next digit in our result. 
Result so far: 2256.0
If we subtract 2130 from 2341, we get 211.
Bring next digit (5) of the dividend behind the 211 and repeat the process: 2115 / 355

Going ahead to step 7:
The number 355 fits into 2115 5 times, leaving a remainder of 340.
Record the quotient 5 as the next digit in the result. 
Result so far: 22565.0
If we take 1775 away from 2115, we end up with 340.
Fetch the next digit (3) from the dividend, attach it to 340 and continue: 3403 / 355

Moving on to step 8:
355 goes into 3403 9 times with a remainder of 208.
Record the quotient 9 as the next digit in the result. 
Result so far: 225659.0
Deduct 3195 from 3403 and we're left with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Let's proceed to step 9:
355 can be fit into 2080 5 times, resulting in a remainder of 305.
Use 5 as the next digit of our solution. 
Result so far: 225659.5
Subtracting 1775 from 2080 leaves us with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Advancing to step 10:
When dividing 3050 by 355, we get 8 with a remainder of 210.
Record the quotient 8 as the next digit in the result. 
Result so far: 225659.58
Subtract 2840 from 3050 to get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

On to step 11:
2100 divided by 355 is 5 with a remainder of 325.
The next digit of our result is 5. 
Result so far: 225659.585
Subtract 1775 from 2100 to get 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Moving on to step 12:
3250 divided by 355 is 9 with a remainder of 55.
The number 9 becomes the next digit in our result. 
Result so far: 225659.5859
Subtracting 3195 from 3250 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 13:
The number 355 fits into 550 1 times, leaving a remainder of 195.
Write down 1 as next digit of the result. 
Result so far: 225659.58591
Deduct 355 from 550 and we're left with 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Going ahead to step 14:
355 can be fit into 1950 5 times, resulting in a remainder of 175.
Put 5 as the next digit of the answer. 
Result so far: 225659.585915
If we subtract 1775 from 1950, we get 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Let's proceed to step 15:
When dividing 1750 by 355, we get 4 with a remainder of 330.
Write down 4 as next digit of the result. 
Result so far: 225659.5859154
If we subtract 1420 from 1750, we get 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Step 16:
355 can be fit into 3300 9 times, resulting in a remainder of 105.
Put 9 as the next digit of the answer. 
Result so far: 225659.58591549
The remainder is 105 after subtracting 3195 from 3300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Our division results in 225659.58591549 with a remaining 1.05e-07.