139512 ÷ 74 
Our goal is to divide 139512 by 74.

Step 1:
1 divided by 74 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 74

Step 2:
74 goes into 13 0 times with a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Bring next digit (9) of the dividend behind the 13 and repeat the process: 139 / 74

On to step 3:
74 goes into 139 1 times with a remainder of 65.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 74 from 139, we get 65.
Grab the next digit (5) from the dividend, add it to 65, then carry on: 655 / 74

Let's proceed to step 4:
When dividing 655 by 74, we get 8 with a remainder of 63.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
Subtract 592 from 655 to get 63.
Grab the next digit (1) from the dividend, add it to 63, then carry on: 631 / 74

Going ahead to step 5:
The number 74 fits into 631 8 times, leaving a remainder of 39.
The next digit of our result is 8. 
Result so far: 188.0
Subtracting 592 from 631 leaves us with 39.
Fetch the next digit (2) from the dividend, attach it to 39 and continue: 392 / 74

Advancing to step 6:
392 divided by 74 is 5 with a remainder of 22.
Record the quotient 5 as the next digit in the result. 
Result so far: 1885.0
The remainder is 22 after subtracting 370 from 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 7:
74 goes into 220 2 times with a remainder of 72.
The number 2 becomes the next digit in our result. 
Result so far: 1885.2
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.

Moving on to step 8:
The number 74 fits into 720 9 times, leaving a remainder of 54.
Record the quotient 9 as the next digit in the result. 
Result so far: 1885.29
Subtracting 666 from 720 leaves us 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.

Step 9:
74 can be fit into 540 7 times, resulting in a remainder of 22.
Use 7 as the next digit of our solution. 
Result so far: 1885.297
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:
If we divide 220 by 74, we get 2 and a remainder of 72.
Record the quotient 2 as the next digit in the result. 
Result so far: 1885.2972
If we subtract 148 from 220, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 11:
74 goes into 720 9 times with a remainder of 54.
The number 9 becomes the next digit in our result. 
Result so far: 1885.29729
Subtract 666 from 720 to 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.

Advancing to step 12:
540 divided by 74 is 7 with a remainder of 22.
Put 7 as the next digit of the answer. 
Result so far: 1885.297297
If we take 518 away from 540, we end up 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.

Advancing to step 13:
The number 74 fits into 220 2 times, leaving a remainder of 72.
Put 2 as the next digit of the answer. 
Result so far: 1885.2972972
Subtract 148 from 220 to get 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 14:
74 can be fit into 720 9 times, resulting in a remainder of 54.
Write down 9 as next digit of the result. 
Result so far: 1885.29729729
Subtracting 666 from 720 leaves us 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.

After the division, we end up with 1885.29729729 and a remainder of 5.4e-08.