39963437 ÷ 316 
Our goal is to divide 39963437 by 316.

Advancing to step 1:
The number 316 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 316

Let's proceed to step 2:
39 divided by 316 is 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Bring next digit (9) of the dividend behind the 39 and repeat the process: 399 / 316

Advancing to step 3:
The number 316 fits into 399 1 times, leaving a remainder of 83.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 316 from 399 to get 83.
Fetch the next digit (6) from the dividend, attach it to 83 and continue: 836 / 316

On to step 4:
316 goes into 836 2 times with a remainder of 204.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
If we subtract 632 from 836, we get 204.
Grab the next digit (3) from the dividend, add it to 204, then carry on: 2043 / 316

Let's proceed to step 5:
The number 316 fits into 2043 6 times, leaving a remainder of 147.
The next digit of our result is 6. 
Result so far: 126.0
Deduct 1896 from 2043 and we're left with 147.
Grab the next digit (4) from the dividend, add it to 147, then carry on: 1474 / 316

Let's proceed to step 6:
316 can be fit into 1474 4 times, resulting in a remainder of 210.
The next digit of our result is 4. 
Result so far: 1264.0
The remainder is 210 after subtracting 1264 from 1474.
Grab the next digit (3) from the dividend, add it to 210, then carry on: 2103 / 316

Let's proceed to step 7:
316 can be fit into 2103 6 times, resulting in a remainder of 207.
Put 6 as the next digit of the answer. 
Result so far: 12646.0
If we take 1896 away from 2103, we end up with 207.
Append the next digit (7) from the dividend to 207 and continue with: 2077 / 316

On to step 8:
When dividing 2077 by 316, we get 6 with a remainder of 181.
Record the quotient 6 as the next digit in the result. 
Result so far: 126466.0
The remainder is 181 after subtracting 1896 from 2077.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Let's proceed to step 9:
The number 316 fits into 1810 5 times, leaving a remainder of 230.
Record the quotient 5 as the next digit in the result. 
Result so far: 126466.5
Deduct 1580 from 1810 and we're left with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

On to step 10:
When dividing 2300 by 316, we get 7 with a remainder of 88.
Record the quotient 7 as the next digit in the result. 
Result so far: 126466.57
The remainder is 88 after subtracting 2212 from 2300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

On to step 11:
316 can be fit into 880 2 times, resulting in a remainder of 248.
Write down 2 as next digit of the result. 
Result so far: 126466.572
If we take 632 away from 880, we end up with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Step 12:
2480 divided by 316 is 7 with a remainder of 268.
Write down 7 as next digit of the result. 
Result so far: 126466.5727
Deduct 2212 from 2480 and we're left with 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

Let's proceed to step 13:
When dividing 2680 by 316, we get 8 with a remainder of 152.
Write down 8 as next digit of the result. 
Result so far: 126466.57278
If we subtract 2528 from 2680, we get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Step 14:
If we divide 1520 by 316, we get 4 and a remainder of 256.
Put 4 as the next digit of the answer. 
Result so far: 126466.572784
Subtract 1264 from 1520 to get 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Moving on to step 15:
If we divide 2560 by 316, we get 8 and a remainder of 32.
The number 8 becomes the next digit in our result. 
Result so far: 126466.5727848
If we take 2528 away from 2560, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 16:
The number 316 fits into 320 1 times, leaving a remainder of 4.
The next digit of our result is 1. 
Result so far: 126466.57278481
Deduct 316 from 320 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 126466.57278481, with a leftover of 4e-09.