We look at the division of 74345389 by 721 
Our goal is to divide 74345389 by 721.

Let's proceed to step 1:
721 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
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (4) from the dividend, add it to 7, then carry on: 74 / 721

Step 2:
When dividing 74 by 721, we get 0 with a remainder of 74.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 74 leaves us with 74.
Append the next digit (3) from the dividend to 74 and continue with: 743 / 721

On to step 3:
721 goes into 743 1 times with a remainder of 22.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 721 from 743, we get 22.
Grab the next digit (4) from the dividend, add it to 22, then carry on: 224 / 721

Going ahead to step 4:
The number 721 fits into 224 0 times, leaving a remainder of 224.
Write down 0 as next digit of the result. 
Result so far: 10.0
The remainder is 224 after subtracting 0 from 224.
Append the next digit (5) from the dividend to 224 and continue with: 2245 / 721

Moving on to step 5:
The number 721 fits into 2245 3 times, leaving a remainder of 82.
Write down 3 as next digit of the result. 
Result so far: 103.0
The remainder is 82 after subtracting 2163 from 2245.
Take the next digit (3) from the dividend and append it to 82, then repeat: 823 / 721

Step 6:
When dividing 823 by 721, we get 1 with a remainder of 102.
The next digit of our result is 1. 
Result so far: 1031.0
Deduct 721 from 823 and we're left with 102.
Bring next digit (8) of the dividend behind the 102 and repeat the process: 1028 / 721

Going ahead to step 7:
721 can be fit into 1028 1 times, resulting in a remainder of 307.
The number 1 becomes the next digit in our result. 
Result so far: 10311.0
Subtracting 721 from 1028 leaves us with 307.
Fetch the next digit (9) from the dividend, attach it to 307 and continue: 3079 / 721

Advancing to step 8:
721 goes into 3079 4 times with a remainder of 195.
Record the quotient 4 as the next digit in the result. 
Result so far: 103114.0
If we subtract 2884 from 3079, we get 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

On to step 9:
When dividing 1950 by 721, we get 2 with a remainder of 508.
Write down 2 as next digit of the result. 
Result so far: 103114.2
Subtract 1442 from 1950 to get 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

Step 10:
721 can be fit into 5080 7 times, resulting in a remainder of 33.
Put 7 as the next digit of the answer. 
Result so far: 103114.27
Deduct 5047 from 5080 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 11:
721 can be fit into 330 0 times, resulting in a remainder of 330.
The next digit of our result is 0. 
Result so far: 103114.27
If we subtract 0 from 330, we get 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Advancing to step 12:
3300 divided by 721 is 4 with a remainder of 416.
The number 4 becomes the next digit in our result. 
Result so far: 103114.2704
If we take 2884 away from 3300, we end up with 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

On to step 13:
721 can be fit into 4160 5 times, resulting in a remainder of 555.
The number 5 becomes the next digit in our result. 
Result so far: 103114.27045
Subtracting 3605 from 4160 leaves us with 555.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5550, and continue the process.

On to step 14:
The number 721 fits into 5550 7 times, leaving a remainder of 503.
Record the quotient 7 as the next digit in the result. 
Result so far: 103114.270457
The remainder is 503 after subtracting 5047 from 5550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5030, and continue the process.

On to step 15:
When dividing 5030 by 721, we get 6 with a remainder of 704.
Write down 6 as next digit of the result. 
Result so far: 103114.2704576
If we subtract 4326 from 5030, we get 704.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7040, and continue the process.

Step 16:
The number 721 fits into 7040 9 times, leaving a remainder of 551.
Use 9 as the next digit of our solution. 
Result so far: 103114.27045769
If we take 6489 away from 7040, we end up with 551.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5510, and continue the process.

The final outcome is 103114.27045769, with a leftover of 5.51e-07.