19451691 ÷ 945 
We want to figure out the number of times 19451691 can be divided by 945.

Moving on to step 1:
When dividing 1 by 945, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 945

Let's proceed to step 2:
945 can be fit into 19 0 times, resulting in a remainder of 19.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 19 and we're left with 19.
Take the next digit (4) from the dividend and append it to 19, then repeat: 194 / 945

Step 3:
945 goes into 194 0 times with a remainder of 194.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 194 leaves us with 194.
Bring next digit (5) of the dividend behind the 194 and repeat the process: 1945 / 945

On to step 4:
When dividing 1945 by 945, we get 2 with a remainder of 55.
The next digit of our result is 2. 
Result so far: 2.0
If we take 1890 away from 1945, we end up with 55.
Fetch the next digit (1) from the dividend, attach it to 55 and continue: 551 / 945

Step 5:
If we divide 551 by 945, we get 0 and a remainder of 551.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Subtracting 0 from 551 leaves us with 551.
Include the next digit (6) from the dividend after 551, then repeat: 5516 / 945

Going ahead to step 6:
If we divide 5516 by 945, we get 5 and a remainder of 791.
Write down 5 as next digit of the result. 
Result so far: 205.0
The remainder is 791 after subtracting 4725 from 5516.
Bring next digit (9) of the dividend behind the 791 and repeat the process: 7919 / 945

Let's proceed to step 7:
945 can be fit into 7919 8 times, resulting in a remainder of 359.
Put 8 as the next digit of the answer. 
Result so far: 2058.0
Subtract 7560 from 7919 to get 359.
Fetch the next digit (1) from the dividend, attach it to 359 and continue: 3591 / 945

Going ahead to step 8:
945 can be fit into 3591 3 times, resulting in a remainder of 756.
Record the quotient 3 as the next digit in the result. 
Result so far: 20583.0
Deduct 2835 from 3591 and we're left with 756.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7560, and continue the process.

Let's proceed to step 9:
The number 945 fits into 7560 8 times, leaving a remainder of 0.
The next digit of our result is 8. 
Result so far: 20583.8
The remainder is 0 after subtracting 7560 from 7560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
945 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 20583.8
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 11:
If we divide 0 by 945, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 20583.8
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 20583.8 with a remainder of 0.0.