We're dividing 21731394 by 173 
We want to divide 21731394 by 173.

Moving on to step 1:
If we divide 2 by 173, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 173

Step 2:
The number 173 fits into 21 0 times, leaving a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Grab the next digit (7) from the dividend, add it to 21, then carry on: 217 / 173

Going ahead to step 3:
The number 173 fits into 217 1 times, leaving a remainder of 44.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 173 away from 217, we end up with 44.
Grab the next digit (3) from the dividend, add it to 44, then carry on: 443 / 173

Going ahead to step 4:
173 goes into 443 2 times with a remainder of 97.
Write down 2 as next digit of the result. 
Result so far: 12.0
Deduct 346 from 443 and we're left with 97.
Bring next digit (1) of the dividend behind the 97 and repeat the process: 971 / 173

Moving on to step 5:
When dividing 971 by 173, we get 5 with a remainder of 106.
The number 5 becomes the next digit in our result. 
Result so far: 125.0
If we subtract 865 from 971, we get 106.
Take the next digit (3) from the dividend and append it to 106, then repeat: 1063 / 173

Advancing to step 6:
When dividing 1063 by 173, we get 6 with a remainder of 25.
The number 6 becomes the next digit in our result. 
Result so far: 1256.0
If we subtract 1038 from 1063, we get 25.
Take the next digit (9) from the dividend and append it to 25, then repeat: 259 / 173

On to step 7:
173 goes into 259 1 times with a remainder of 86.
The number 1 becomes the next digit in our result. 
Result so far: 12561.0
If we take 173 away from 259, we end up with 86.
Fetch the next digit (4) from the dividend, attach it to 86 and continue: 864 / 173

Advancing to step 8:
If we divide 864 by 173, we get 4 and a remainder of 172.
Put 4 as the next digit of the answer. 
Result so far: 125614.0
If we take 692 away from 864, we end up with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

On to step 9:
If we divide 1720 by 173, we get 9 and a remainder of 163.
Write down 9 as next digit of the result. 
Result so far: 125614.9
The remainder is 163 after subtracting 1557 from 1720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

On to step 10:
1630 divided by 173 is 9 with a remainder of 73.
The number 9 becomes the next digit in our result. 
Result so far: 125614.99
If we subtract 1557 from 1630, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

After the division, we end up with 125614.99 and a remainder of 0.073.