312561 ÷ 74 
Let's see how many times 74 fits into 312561.

Step 1:
3 divided by 74 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 74

On to step 2:
74 can be fit into 31 0 times, resulting in a remainder of 31.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 31 after subtracting 0 from 31.
Include the next digit (2) from the dividend after 31, then repeat: 312 / 74

Advancing to step 3:
The number 74 fits into 312 4 times, leaving a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 296 from 312 leaves us with 16.
Grab the next digit (5) from the dividend, add it to 16, then carry on: 165 / 74

Moving on to step 4:
165 divided by 74 is 2 with a remainder of 17.
Write down 2 as next digit of the result. 
Result so far: 42.0
If we take 148 away from 165, we end up with 17.
Bring next digit (6) of the dividend behind the 17 and repeat the process: 176 / 74

Moving on to step 5:
When dividing 176 by 74, we get 2 with a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 422.0
Subtracting 148 from 176 leaves us with 28.
Fetch the next digit (1) from the dividend, attach it to 28 and continue: 281 / 74

Step 6:
74 goes into 281 3 times with a remainder of 59.
The next digit of our result is 3. 
Result so far: 4223.0
If we take 222 away from 281, we end up 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.

Going ahead to step 7:
74 goes into 590 7 times with a remainder of 72.
Record the quotient 7 as the next digit in the result. 
Result so far: 4223.7
Subtracting 518 from 590 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 8:
When dividing 720 by 74, we get 9 with a remainder of 54.
The number 9 becomes the next digit in our result. 
Result so far: 4223.79
If we subtract 666 from 720, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 9:
When dividing 540 by 74, we get 7 with a remainder of 22.
The number 7 becomes the next digit in our result. 
Result so far: 4223.797
Subtracting 518 from 540 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 10:
When dividing 220 by 74, we get 2 with a remainder of 72.
Write down 2 as next digit of the result. 
Result so far: 4223.7972
Deduct 148 from 220 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 11:
74 can be fit into 720 9 times, resulting in a remainder of 54.
The number 9 becomes the next digit in our result. 
Result so far: 4223.79729
Deduct 666 from 720 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 12:
74 can be fit into 540 7 times, resulting in a remainder of 22.
The number 7 becomes the next digit in our result. 
Result so far: 4223.797297
Deduct 518 from 540 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 13:
74 goes into 220 2 times with a remainder of 72.
Write down 2 as next digit of the result. 
Result so far: 4223.7972972
The remainder is 72 after subtracting 148 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 14:
74 can be fit into 720 9 times, resulting in a remainder of 54.
The number 9 becomes the next digit in our result. 
Result so far: 4223.79729729
The remainder is 54 after subtracting 666 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final outcome is 4223.79729729, with a leftover of 5.4e-08.