We look at the division of 78129740 by 209 
We're looking to find how many times 209 goes into 78129740.

On to step 1:
7 divided by 209 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 209

Step 2:
78 divided by 209 is 0 with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Append the next digit (1) from the dividend to 78 and continue with: 781 / 209

Going ahead to step 3:
209 can be fit into 781 3 times, resulting in a remainder of 154.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 627 from 781 and we're left with 154.
Bring next digit (2) of the dividend behind the 154 and repeat the process: 1542 / 209

Advancing to step 4:
When dividing 1542 by 209, we get 7 with a remainder of 79.
Put 7 as the next digit of the answer. 
Result so far: 37.0
Deduct 1463 from 1542 and we're left with 79.
Take the next digit (9) from the dividend and append it to 79, then repeat: 799 / 209

Going ahead to step 5:
209 goes into 799 3 times with a remainder of 172.
The next digit of our result is 3. 
Result so far: 373.0
If we take 627 away from 799, we end up with 172.
Bring next digit (7) of the dividend behind the 172 and repeat the process: 1727 / 209

Moving on to step 6:
When dividing 1727 by 209, we get 8 with a remainder of 55.
The number 8 becomes the next digit in our result. 
Result so far: 3738.0
If we take 1672 away from 1727, we end up with 55.
Fetch the next digit (4) from the dividend, attach it to 55 and continue: 554 / 209

Moving on to step 7:
554 divided by 209 is 2 with a remainder of 136.
The number 2 becomes the next digit in our result. 
Result so far: 37382.0
If we take 418 away from 554, we end up with 136.
Bring next digit (0) of the dividend behind the 136 and repeat the process: 1360 / 209

Let's proceed to step 8:
When dividing 1360 by 209, we get 6 with a remainder of 106.
Use 6 as the next digit of our solution. 
Result so far: 373826.0
If we take 1254 away from 1360, we end up with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Advancing to step 9:
209 goes into 1060 5 times with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 373826.5
The remainder is 15 after subtracting 1045 from 1060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 10:
The number 209 fits into 150 0 times, leaving a remainder of 150.
Record the quotient 0 as the next digit in the result. 
Result so far: 373826.5
Deduct 0 from 150 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Going ahead to step 11:
When dividing 1500 by 209, we get 7 with a remainder of 37.
The number 7 becomes the next digit in our result. 
Result so far: 373826.507
The remainder is 37 after subtracting 1463 from 1500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 12:
209 goes into 370 1 times with a remainder of 161.
The next digit of our result is 1. 
Result so far: 373826.5071
If we subtract 209 from 370, we get 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

On to step 13:
The number 209 fits into 1610 7 times, leaving a remainder of 147.
Record the quotient 7 as the next digit in the result. 
Result so far: 373826.50717
If we subtract 1463 from 1610, we get 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

On to step 14:
209 can be fit into 1470 7 times, resulting in a remainder of 7.
Write down 7 as next digit of the result. 
Result so far: 373826.507177
If we subtract 1463 from 1470, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

After the division, we end up with 373826.507177 and a remainder of 7e-07.