We're dividing 42455212 by 312 
We want to figure out the number of times 42455212 can be divided by 312.

Moving on to step 1:
4 divided by 312 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 312

On to step 2:
312 can be fit into 42 0 times, resulting in a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Include the next digit (4) from the dividend after 42, then repeat: 424 / 312

Moving on to step 3:
If we divide 424 by 312, we get 1 and a remainder of 112.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 112 after subtracting 312 from 424.
Include the next digit (5) from the dividend after 112, then repeat: 1125 / 312

Let's proceed to step 4:
If we divide 1125 by 312, we get 3 and a remainder of 189.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtracting 936 from 1125 leaves us with 189.
Append the next digit (5) from the dividend to 189 and continue with: 1895 / 312

Advancing to step 5:
The number 312 fits into 1895 6 times, leaving a remainder of 23.
Write down 6 as next digit of the result. 
Result so far: 136.0
Subtract 1872 from 1895 to get 23.
Take the next digit (2) from the dividend and append it to 23, then repeat: 232 / 312

Moving on to step 6:
312 goes into 232 0 times with a remainder of 232.
Record the quotient 0 as the next digit in the result. 
Result so far: 1360.0
Subtracting 0 from 232 leaves us with 232.
Take the next digit (1) from the dividend and append it to 232, then repeat: 2321 / 312

Let's proceed to step 7:
2321 divided by 312 is 7 with a remainder of 137.
Record the quotient 7 as the next digit in the result. 
Result so far: 13607.0
Subtract 2184 from 2321 to get 137.
Bring next digit (2) of the dividend behind the 137 and repeat the process: 1372 / 312

Moving on to step 8:
312 can be fit into 1372 4 times, resulting in a remainder of 124.
Put 4 as the next digit of the answer. 
Result so far: 136074.0
Subtract 1248 from 1372 to get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Advancing to step 9:
312 can be fit into 1240 3 times, resulting in a remainder of 304.
The number 3 becomes the next digit in our result. 
Result so far: 136074.3
Subtract 936 from 1240 to get 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Step 10:
The number 312 fits into 3040 9 times, leaving a remainder of 232.
Record the quotient 9 as the next digit in the result. 
Result so far: 136074.39
If we take 2808 away from 3040, we end up with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Advancing to step 11:
312 goes into 2320 7 times with a remainder of 136.
The next digit of our result is 7. 
Result so far: 136074.397
The remainder is 136 after subtracting 2184 from 2320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Going ahead to step 12:
312 goes into 1360 4 times with a remainder of 112.
The next digit of our result is 4. 
Result so far: 136074.3974
If we subtract 1248 from 1360, we get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Advancing to step 13:
1120 divided by 312 is 3 with a remainder of 184.
The number 3 becomes the next digit in our result. 
Result so far: 136074.39743
Subtracting 936 from 1120 leaves us with 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Advancing to step 14:
If we divide 1840 by 312, we get 5 and a remainder of 280.
Record the quotient 5 as the next digit in the result. 
Result so far: 136074.397435
Deduct 1560 from 1840 and we're left with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Going ahead to step 15:
If we divide 2800 by 312, we get 8 and a remainder of 304.
Write down 8 as next digit of the result. 
Result so far: 136074.3974358
Deduct 2496 from 2800 and we're left with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Let's proceed to step 16:
If we divide 3040 by 312, we get 9 and a remainder of 232.
Put 9 as the next digit of the answer. 
Result so far: 136074.39743589
If we subtract 2808 from 3040, we get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

After the division, we end up with 136074.39743589 and a remainder of 2.32e-07.