We're dividing 18378090 by 221 
We're looking to find how many times 221 goes into 18378090.

Moving on to step 1:
If we divide 1 by 221, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 221

Going ahead to step 2:
When dividing 18 by 221, we get 0 with a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 18 and we're left with 18.
Include the next digit (3) from the dividend after 18, then repeat: 183 / 221

Step 3:
221 goes into 183 0 times with a remainder of 183.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 183, we end up with 183.
Grab the next digit (7) from the dividend, add it to 183, then carry on: 1837 / 221

Moving on to step 4:
If we divide 1837 by 221, we get 8 and a remainder of 69.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we take 1768 away from 1837, we end up with 69.
Include the next digit (8) from the dividend after 69, then repeat: 698 / 221

Let's proceed to step 5:
221 can be fit into 698 3 times, resulting in a remainder of 35.
The number 3 becomes the next digit in our result. 
Result so far: 83.0
Subtract 663 from 698 to get 35.
Include the next digit (0) from the dividend after 35, then repeat: 350 / 221

Going ahead to step 6:
221 goes into 350 1 times with a remainder of 129.
Put 1 as the next digit of the answer. 
Result so far: 831.0
Subtract 221 from 350 to get 129.
Append the next digit (9) from the dividend to 129 and continue with: 1299 / 221

Step 7:
The number 221 fits into 1299 5 times, leaving a remainder of 194.
Use 5 as the next digit of our solution. 
Result so far: 8315.0
Subtract 1105 from 1299 to get 194.
Bring next digit (0) of the dividend behind the 194 and repeat the process: 1940 / 221

Step 8:
221 goes into 1940 8 times with a remainder of 172.
Record the quotient 8 as the next digit in the result. 
Result so far: 83158.0
If we take 1768 away from 1940, 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.

Advancing to step 9:
1720 divided by 221 is 7 with a remainder of 173.
The next digit of our result is 7. 
Result so far: 83158.7
If we take 1547 away from 1720, we end up with 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

Step 10:
When dividing 1730 by 221, we get 7 with a remainder of 183.
Write down 7 as next digit of the result. 
Result so far: 83158.77
If we subtract 1547 from 1730, we get 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1830, and continue the process.

After the division, we end up with 83158.77 and a remainder of 0.183.