We look at the division of 42400387 by 307 
We want to divide 42400387 by 307.

Let's proceed to step 1:
The number 307 fits into 4 0 times, leaving a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 307

Going ahead to step 2:
The number 307 fits into 42 0 times, leaving a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Bring next digit (4) of the dividend behind the 42 and repeat the process: 424 / 307

Going ahead to step 3:
If we divide 424 by 307, we get 1 and a remainder of 117.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 307 away from 424, we end up with 117.
Append the next digit (0) from the dividend to 117 and continue with: 1170 / 307

Let's proceed to step 4:
307 can be fit into 1170 3 times, resulting in a remainder of 249.
The next digit of our result is 3. 
Result so far: 13.0
If we take 921 away from 1170, we end up with 249.
Take the next digit (0) from the dividend and append it to 249, then repeat: 2490 / 307

Let's proceed to step 5:
307 can be fit into 2490 8 times, resulting in a remainder of 34.
Put 8 as the next digit of the answer. 
Result so far: 138.0
If we subtract 2456 from 2490, we get 34.
Take the next digit (3) from the dividend and append it to 34, then repeat: 343 / 307

Let's proceed to step 6:
307 can be fit into 343 1 times, resulting in a remainder of 36.
Put 1 as the next digit of the answer. 
Result so far: 1381.0
Deduct 307 from 343 and we're left with 36.
Bring next digit (8) of the dividend behind the 36 and repeat the process: 368 / 307

Moving on to step 7:
307 goes into 368 1 times with a remainder of 61.
The next digit of our result is 1. 
Result so far: 13811.0
Deduct 307 from 368 and we're left with 61.
Take the next digit (7) from the dividend and append it to 61, then repeat: 617 / 307

Let's proceed to step 8:
The number 307 fits into 617 2 times, leaving a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 138112.0
If we take 614 away from 617, we end up 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.

Let's proceed to step 9:
307 can be fit into 30 0 times, resulting in a remainder of 30.
The next digit of our result is 0. 
Result so far: 138112.0
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 10:
307 goes into 300 0 times with a remainder of 300.
Write down 0 as next digit of the result. 
Result so far: 138112.0
If we take 0 away from 300, we end up with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The final result is 138112.0 with a remainder of 0.3.