We divide 345421 by 91
We want to figure out the number of times 345421 can be divided by 91.

Advancing to step 1:
91 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 91

Advancing to step 2:
34 divided by 91 is 0 with a remainder of 34.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 34, we end up with 34.
Take the next digit (5) from the dividend and append it to 34, then repeat: 345 / 91

Moving on to step 3:
345 divided by 91 is 3 with a remainder of 72.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 273 from 345, we get 72.
Append the next digit (4) from the dividend to 72 and continue with: 724 / 91

On to step 4:
When dividing 724 by 91, we get 7 with a remainder of 87.
Write down 7 as next digit of the result. 
Result so far: 37.0
If we take 637 away from 724, we end up with 87.
Bring next digit (2) of the dividend behind the 87 and repeat the process: 872 / 91

Moving on to step 5:
The number 91 fits into 872 9 times, leaving a remainder of 53.
Record the quotient 9 as the next digit in the result. 
Result so far: 379.0
The remainder is 53 after subtracting 819 from 872.
Fetch the next digit (1) from the dividend, attach it to 53 and continue: 531 / 91

Step 6:
531 divided by 91 is 5 with a remainder of 76.
Record the quotient 5 as the next digit in the result. 
Result so far: 3795.0
If we subtract 455 from 531, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 7:
91 goes into 760 8 times with a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 3795.8
Subtracting 728 from 760 leaves us 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.

Moving on to step 8:
91 goes into 320 3 times with a remainder of 47.
The number 3 becomes the next digit in our result. 
Result so far: 3795.83
If we take 273 away from 320, we end up with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 9:
91 goes into 470 5 times with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 3795.835
The remainder is 15 after subtracting 455 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 10:
91 goes into 150 1 times with a remainder of 59.
Record the quotient 1 as the next digit in the result. 
Result so far: 3795.8351
If we take 91 away from 150, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Step 11:
If we divide 590 by 91, we get 6 and a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 3795.83516
If we take 546 away from 590, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 12:
If we divide 440 by 91, we get 4 and a remainder of 76.
Record the quotient 4 as the next digit in the result. 
Result so far: 3795.835164
If we subtract 364 from 440, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 13:
760 divided by 91 is 8 with a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 3795.8351648
Subtract 728 from 760 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.

Step 14:
91 goes into 320 3 times with a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 3795.83516483
Subtracting 273 from 320 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

The quotient of the division is 3795.83516483, and the remainder is 4.7e-08.