Let's divide 12870870 by 173
Let's see how many times 173 fits into 12870870.

On to step 1:
173 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 173

Going ahead to step 2:
When dividing 12 by 173, we get 0 with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Append the next digit (8) from the dividend to 12 and continue with: 128 / 173

Let's proceed to step 3:
173 goes into 128 0 times with a remainder of 128.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 128, we end up with 128.
Take the next digit (7) from the dividend and append it to 128, then repeat: 1287 / 173

On to step 4:
When dividing 1287 by 173, we get 7 with a remainder of 76.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtract 1211 from 1287 to get 76.
Fetch the next digit (0) from the dividend, attach it to 76 and continue: 760 / 173

Step 5:
173 can be fit into 760 4 times, resulting in a remainder of 68.
Record the quotient 4 as the next digit in the result. 
Result so far: 74.0
Subtract 692 from 760 to get 68.
Fetch the next digit (8) from the dividend, attach it to 68 and continue: 688 / 173

Moving on to step 6:
The number 173 fits into 688 3 times, leaving a remainder of 169.
Write down 3 as next digit of the result. 
Result so far: 743.0
Subtract 519 from 688 to get 169.
Bring next digit (7) of the dividend behind the 169 and repeat the process: 1697 / 173

Moving on to step 7:
When dividing 1697 by 173, we get 9 with a remainder of 140.
The next digit of our result is 9. 
Result so far: 7439.0
Subtract 1557 from 1697 to get 140.
Take the next digit (0) from the dividend and append it to 140, then repeat: 1400 / 173

Going ahead to step 8:
173 can be fit into 1400 8 times, resulting in a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 74398.0
Deduct 1384 from 1400 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
The number 173 fits into 160 0 times, leaving a remainder of 160.
The next digit of our result is 0. 
Result so far: 74398.0
Deduct 0 from 160 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Going ahead to step 10:
1600 divided by 173 is 9 with a remainder of 43.
Use 9 as the next digit of our solution. 
Result so far: 74398.09
Subtracting 1557 from 1600 leaves us with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Step 11:
If we divide 430 by 173, we get 2 and a remainder of 84.
Use 2 as the next digit of our solution. 
Result so far: 74398.092
If we take 346 away from 430, we end up with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

On to step 12:
If we divide 840 by 173, we get 4 and a remainder of 148.
Record the quotient 4 as the next digit in the result. 
Result so far: 74398.0924
If we subtract 692 from 840, we get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Going ahead to step 13:
If we divide 1480 by 173, we get 8 and a remainder of 96.
Put 8 as the next digit of the answer. 
Result so far: 74398.09248
The remainder is 96 after subtracting 1384 from 1480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Let's proceed to step 14:
When dividing 960 by 173, we get 5 with a remainder of 95.
The number 5 becomes the next digit in our result. 
Result so far: 74398.092485
Deduct 865 from 960 and we're left with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

On to step 15:
If we divide 950 by 173, we get 5 and a remainder of 85.
The number 5 becomes the next digit in our result. 
Result so far: 74398.0924855
Subtracting 865 from 950 leaves us with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Our division results in 74398.0924855 with a remaining 8.5e-07.