We divide 91190428 by 210
We want to figure out the number of times 91190428 can be divided by 210.

Let's proceed to step 1:
The number 210 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 210

Step 2:
91 divided by 210 is 0 with a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 91 to get 91.
Bring next digit (1) of the dividend behind the 91 and repeat the process: 911 / 210

Step 3:
If we divide 911 by 210, we get 4 and a remainder of 71.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 71 after subtracting 840 from 911.
Take the next digit (9) from the dividend and append it to 71, then repeat: 719 / 210

On to step 4:
210 goes into 719 3 times with a remainder of 89.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
If we take 630 away from 719, we end up with 89.
Include the next digit (0) from the dividend after 89, then repeat: 890 / 210

Advancing to step 5:
210 goes into 890 4 times with a remainder of 50.
Use 4 as the next digit of our solution. 
Result so far: 434.0
Deduct 840 from 890 and we're left with 50.
Fetch the next digit (4) from the dividend, attach it to 50 and continue: 504 / 210

Advancing to step 6:
When dividing 504 by 210, we get 2 with a remainder of 84.
Put 2 as the next digit of the answer. 
Result so far: 4342.0
Deduct 420 from 504 and we're left with 84.
Append the next digit (2) from the dividend to 84 and continue with: 842 / 210

Going ahead to step 7:
210 can be fit into 842 4 times, resulting in a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 43424.0
Subtract 840 from 842 to get 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 210

Step 8:
210 goes into 28 0 times with a remainder of 28.
Write down 0 as next digit of the result. 
Result so far: 434240.0
Deduct 0 from 28 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 9:
210 can be fit into 280 1 times, resulting in a remainder of 70.
The number 1 becomes the next digit in our result. 
Result so far: 434240.1
Deduct 210 from 280 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 10:
The number 210 fits into 700 3 times, leaving a remainder of 70.
Record the quotient 3 as the next digit in the result. 
Result so far: 434240.13
Subtract 630 from 700 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 11:
When dividing 700 by 210, we get 3 with a remainder of 70.
The number 3 becomes the next digit in our result. 
Result so far: 434240.133
Subtract 630 from 700 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The final result is 434240.133 with a remainder of 0.007.