We divide 73555571 by 21
We want to divide 73555571 by 21.

Step 1:
21 can be fit into 7 0 times, resulting in a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (3) from the dividend after 7, then repeat: 73 / 21

Step 2:
21 can be fit into 73 3 times, resulting in a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 63 from 73, we get 10.
Fetch the next digit (5) from the dividend, attach it to 10 and continue: 105 / 21

On to step 3:
When dividing 105 by 21, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
Subtracting 105 from 105 leaves us with 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 21

Advancing to step 4:
21 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 350.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 21

Advancing to step 5:
If we divide 55 by 21, we get 2 and a remainder of 13.
Write down 2 as next digit of the result. 
Result so far: 3502.0
Deduct 42 from 55 and we're left with 13.
Append the next digit (5) from the dividend to 13 and continue with: 135 / 21

Let's proceed to step 6:
21 goes into 135 6 times with a remainder of 9.
Put 6 as the next digit of the answer. 
Result so far: 35026.0
If we take 126 away from 135, we end up with 9.
Append the next digit (7) from the dividend to 9 and continue with: 97 / 21

Step 7:
When dividing 97 by 21, we get 4 with a remainder of 13.
The next digit of our result is 4. 
Result so far: 350264.0
If we take 84 away from 97, we end up with 13.
Take the next digit (1) from the dividend and append it to 13, then repeat: 131 / 21

Going ahead to step 8:
When dividing 131 by 21, we get 6 with a remainder of 5.
Record the quotient 6 as the next digit in the result. 
Result so far: 3502646.0
If we take 126 away from 131, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 9:
21 can be fit into 50 2 times, resulting in a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 3502646.2
If we subtract 42 from 50, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 10:
80 divided by 21 is 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 3502646.23
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 11:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 3502646.238
Subtract 168 from 170 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 12:
When dividing 20 by 21, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 3502646.238
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 13:
When dividing 200 by 21, we get 9 with a remainder of 11.
The next digit of our result is 9. 
Result so far: 3502646.23809
Subtract 189 from 200 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 14:
When dividing 110 by 21, we get 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 3502646.238095
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 15:
50 divided by 21 is 2 with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 3502646.2380952
Subtract 42 from 50 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 16:
21 can be fit into 80 3 times, resulting in a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 3502646.23809523
Deduct 63 from 80 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

The final result is 3502646.23809523 with a remainder of 1.7e-08.