We're dividing 315435 by 72 
We're looking to find how many times 72 goes into 315435.

Going ahead to step 1:
If we divide 3 by 72, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 72

Going ahead to step 2:
If we divide 31 by 72, we get 0 and a remainder of 31.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 31 leaves us with 31.
Grab the next digit (5) from the dividend, add it to 31, then carry on: 315 / 72

Going ahead to step 3:
If we divide 315 by 72, we get 4 and a remainder of 27.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 288 away from 315, we end up with 27.
Take the next digit (4) from the dividend and append it to 27, then repeat: 274 / 72

Moving on to step 4:
72 can be fit into 274 3 times, resulting in a remainder of 58.
Write down 3 as next digit of the result. 
Result so far: 43.0
Subtracting 216 from 274 leaves us with 58.
Take the next digit (3) from the dividend and append it to 58, then repeat: 583 / 72

Advancing to step 5:
If we divide 583 by 72, we get 8 and a remainder of 7.
Record the quotient 8 as the next digit in the result. 
Result so far: 438.0
Subtract 576 from 583 to get 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 72

Advancing to step 6:
75 divided by 72 is 1 with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 4381.0
Deduct 72 from 75 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
72 goes into 30 0 times with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 4381.0
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
72 goes into 300 4 times with a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 4381.04
If we subtract 288 from 300, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 9:
72 goes into 120 1 times with a remainder of 48.
Use 1 as the next digit of our solution. 
Result so far: 4381.041
Subtract 72 from 120 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 10:
72 can be fit into 480 6 times, resulting in a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 4381.0416
Subtracting 432 from 480 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 11:
The number 72 fits into 480 6 times, leaving a remainder of 48.
The next digit of our result is 6. 
Result so far: 4381.04166
If we take 432 away from 480, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final outcome is 4381.04166, with a leftover of 4.8e-05.