843890 ÷ 72 
We want to figure out the number of times 843890 can be divided by 72.

Let's proceed to step 1:
8 divided by 72 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 72

Going ahead to step 2:
72 can be fit into 84 1 times, resulting in a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 72 away from 84, we end up with 12.
Append the next digit (3) from the dividend to 12 and continue with: 123 / 72

Advancing to step 3:
When dividing 123 by 72, we get 1 with a remainder of 51.
Write down 1 as next digit of the result. 
Result so far: 11.0
Deduct 72 from 123 and we're left with 51.
Grab the next digit (8) from the dividend, add it to 51, then carry on: 518 / 72

Let's proceed to step 4:
518 divided by 72 is 7 with a remainder of 14.
Record the quotient 7 as the next digit in the result. 
Result so far: 117.0
If we take 504 away from 518, we end up with 14.
Append the next digit (9) from the dividend to 14 and continue with: 149 / 72

Let's proceed to step 5:
The number 72 fits into 149 2 times, leaving a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 1172.0
If we subtract 144 from 149, we get 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 72

Let's proceed to step 6:
72 can be fit into 50 0 times, resulting in a remainder of 50.
The next digit of our result is 0. 
Result so far: 11720.0
If we subtract 0 from 50, we 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.

Let's proceed to step 7:
When dividing 500 by 72, we get 6 with a remainder of 68.
Use 6 as the next digit of our solution. 
Result so far: 11720.6
Deduct 432 from 500 and we're left with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 8:
680 divided by 72 is 9 with a remainder of 32.
The number 9 becomes the next digit in our result. 
Result so far: 11720.69
If we take 648 away from 680, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 9:
320 divided by 72 is 4 with a remainder of 32.
Record the quotient 4 as the next digit in the result. 
Result so far: 11720.694
Subtract 288 from 320 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 10:
72 can be fit into 320 4 times, resulting in a remainder of 32.
The number 4 becomes the next digit in our result. 
Result so far: 11720.6944
Deduct 288 from 320 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final result is 11720.6944 with a remainder of 0.00032.