45480286 ÷ 312 
Our goal is to divide 45480286 by 312.

Step 1:
312 goes into 4 0 times 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 (5) from the dividend, add it to 4, then carry on: 45 / 312

Going ahead to step 2:
45 divided by 312 is 0 with a remainder of 45.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 45, we end up with 45.
Grab the next digit (4) from the dividend, add it to 45, then carry on: 454 / 312

Moving on to step 3:
If we divide 454 by 312, we get 1 and a remainder of 142.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 312 from 454 to get 142.
Include the next digit (8) from the dividend after 142, then repeat: 1428 / 312

On to step 4:
If we divide 1428 by 312, we get 4 and a remainder of 180.
Use 4 as the next digit of our solution. 
Result so far: 14.0
Deduct 1248 from 1428 and we're left with 180.
Take the next digit (0) from the dividend and append it to 180, then repeat: 1800 / 312

Going ahead to step 5:
1800 divided by 312 is 5 with a remainder of 240.
Use 5 as the next digit of our solution. 
Result so far: 145.0
If we subtract 1560 from 1800, we get 240.
Append the next digit (2) from the dividend to 240 and continue with: 2402 / 312

Step 6:
When dividing 2402 by 312, we get 7 with a remainder of 218.
Use 7 as the next digit of our solution. 
Result so far: 1457.0
If we take 2184 away from 2402, we end up with 218.
Include the next digit (8) from the dividend after 218, then repeat: 2188 / 312

Let's proceed to step 7:
312 goes into 2188 7 times with a remainder of 4.
Put 7 as the next digit of the answer. 
Result so far: 14577.0
If we take 2184 away from 2188, we end up with 4.
Fetch the next digit (6) from the dividend, attach it to 4 and continue: 46 / 312

Moving on to step 8:
The number 312 fits into 46 0 times, leaving a remainder of 46.
Record the quotient 0 as the next digit in the result. 
Result so far: 145770.0
Subtract 0 from 46 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 9:
When dividing 460 by 312, we get 1 with a remainder of 148.
Record the quotient 1 as the next digit in the result. 
Result so far: 145770.1
If we take 312 away from 460, we end up with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Moving on to step 10:
1480 divided by 312 is 4 with a remainder of 232.
The number 4 becomes the next digit in our result. 
Result so far: 145770.14
If we take 1248 away from 1480, 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.

Let's proceed to step 11:
312 can be fit into 2320 7 times, resulting in a remainder of 136.
Use 7 as the next digit of our solution. 
Result so far: 145770.147
Deduct 2184 from 2320 and we're left with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Let's proceed to step 12:
312 can be fit into 1360 4 times, resulting in a remainder of 112.
The number 4 becomes the next digit in our result. 
Result so far: 145770.1474
The remainder is 112 after subtracting 1248 from 1360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Going ahead to step 13:
1120 divided by 312 is 3 with a remainder of 184.
Put 3 as the next digit of the answer. 
Result so far: 145770.14743
If we take 936 away from 1120, we end up 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.

Going ahead to step 14:
The number 312 fits into 1840 5 times, leaving a remainder of 280.
Put 5 as the next digit of the answer. 
Result so far: 145770.147435
Subtracting 1560 from 1840 leaves us 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:
2800 divided by 312 is 8 with a remainder of 304.
The number 8 becomes the next digit in our result. 
Result so far: 145770.1474358
Subtract 2496 from 2800 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.

Let's proceed to step 16:
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: 145770.14743589
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.

After the division, we end up with 145770.14743589 and a remainder of 2.32e-07.