We're dividing 53705601 by 309 
Let's see how many times 309 fits into 53705601.

Going ahead to step 1:
309 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 309

On to step 2:
309 goes into 53 0 times with a remainder of 53.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 53 after subtracting 0 from 53.
Fetch the next digit (7) from the dividend, attach it to 53 and continue: 537 / 309

Moving on to step 3:
If we divide 537 by 309, we get 1 and a remainder of 228.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 309 away from 537, we end up with 228.
Take the next digit (0) from the dividend and append it to 228, then repeat: 2280 / 309

Going ahead to step 4:
When dividing 2280 by 309, we get 7 with a remainder of 117.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
The remainder is 117 after subtracting 2163 from 2280.
Take the next digit (5) from the dividend and append it to 117, then repeat: 1175 / 309

Going ahead to step 5:
If we divide 1175 by 309, we get 3 and a remainder of 248.
Write down 3 as next digit of the result. 
Result so far: 173.0
Subtract 927 from 1175 to get 248.
Bring next digit (6) of the dividend behind the 248 and repeat the process: 2486 / 309

Step 6:
If we divide 2486 by 309, we get 8 and a remainder of 14.
Record the quotient 8 as the next digit in the result. 
Result so far: 1738.0
Deduct 2472 from 2486 and we're left with 14.
Bring next digit (0) of the dividend behind the 14 and repeat the process: 140 / 309

Moving on to step 7:
The number 309 fits into 140 0 times, leaving a remainder of 140.
Put 0 as the next digit of the answer. 
Result so far: 17380.0
If we take 0 away from 140, we end up with 140.
Grab the next digit (1) from the dividend, add it to 140, then carry on: 1401 / 309

Moving on to step 8:
The number 309 fits into 1401 4 times, leaving a remainder of 165.
Use 4 as the next digit of our solution. 
Result so far: 173804.0
The remainder is 165 after subtracting 1236 from 1401.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Let's proceed to step 9:
309 can be fit into 1650 5 times, resulting in a remainder of 105.
The next digit of our result is 5. 
Result so far: 173804.5
If we take 1545 away from 1650, we end up with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Going ahead to step 10:
The number 309 fits into 1050 3 times, leaving a remainder of 123.
Use 3 as the next digit of our solution. 
Result so far: 173804.53
Subtract 927 from 1050 to get 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

Step 11:
309 goes into 1230 3 times with a remainder of 303.
Write down 3 as next digit of the result. 
Result so far: 173804.533
Deduct 927 from 1230 and we're left with 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

After the division, we end up with 173804.533 and a remainder of 0.0303.