We divide 73874021 by 210
We want to figure out the number of times 73874021 can be divided by 210.

Moving on to step 1:
7 divided by 210 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 210

On to step 2:
The number 210 fits into 73 0 times, leaving a remainder of 73.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 73 leaves us with 73.
Take the next digit (8) from the dividend and append it to 73, then repeat: 738 / 210

Moving on to step 3:
If we divide 738 by 210, we get 3 and a remainder of 108.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 630 from 738 and we're left with 108.
Fetch the next digit (7) from the dividend, attach it to 108 and continue: 1087 / 210

Advancing to step 4:
210 goes into 1087 5 times with a remainder of 37.
Record the quotient 5 as the next digit in the result. 
Result so far: 35.0
Deduct 1050 from 1087 and we're left with 37.
Append the next digit (4) from the dividend to 37 and continue with: 374 / 210

Advancing to step 5:
The number 210 fits into 374 1 times, leaving a remainder of 164.
Record the quotient 1 as the next digit in the result. 
Result so far: 351.0
Subtract 210 from 374 to get 164.
Include the next digit (0) from the dividend after 164, then repeat: 1640 / 210

Step 6:
1640 divided by 210 is 7 with a remainder of 170.
Put 7 as the next digit of the answer. 
Result so far: 3517.0
If we take 1470 away from 1640, we end up with 170.
Fetch the next digit (2) from the dividend, attach it to 170 and continue: 1702 / 210

Going ahead to step 7:
If we divide 1702 by 210, we get 8 and a remainder of 22.
Put 8 as the next digit of the answer. 
Result so far: 35178.0
If we subtract 1680 from 1702, we get 22.
Append the next digit (1) from the dividend to 22 and continue with: 221 / 210

Going ahead to step 8:
When dividing 221 by 210, we get 1 with a remainder of 11.
Use 1 as the next digit of our solution. 
Result so far: 351781.0
If we take 210 away from 221, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 9:
If we divide 110 by 210, we get 0 and a remainder of 110.
Put 0 as the next digit of the answer. 
Result so far: 351781.0
Subtracting 0 from 110 leaves us with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

On to step 10:
1100 divided by 210 is 5 with a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 351781.05
Subtract 1050 from 1100 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 11:
If we divide 500 by 210, we get 2 and a remainder of 80.
The next digit of our result is 2. 
Result so far: 351781.052
The remainder is 80 after subtracting 420 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 12:
When dividing 800 by 210, we get 3 with a remainder of 170.
The next digit of our result is 3. 
Result so far: 351781.0523
Subtract 630 from 800 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Going ahead to step 13:
If we divide 1700 by 210, we get 8 and a remainder of 20.
The next digit of our result is 8. 
Result so far: 351781.05238
Subtract 1680 from 1700 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.

On to step 14:
210 goes into 200 0 times with a remainder of 200.
Use 0 as the next digit of our solution. 
Result so far: 351781.05238
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 15:
The number 210 fits into 2000 9 times, leaving a remainder of 110.
Record the quotient 9 as the next digit in the result. 
Result so far: 351781.0523809
Deduct 1890 from 2000 and we're left with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Going ahead to step 16:
1100 divided by 210 is 5 with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 351781.05238095
Subtract 1050 from 1100 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

After the division, we end up with 351781.05238095 and a remainder of 5e-08.