47171189 ÷ 645 
We want to figure out the number of times 47171189 can be divided by 645.

Going ahead to step 1:
When dividing 4 by 645, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (7) from the dividend and append it to 4, then repeat: 47 / 645

Step 2:
The number 645 fits into 47 0 times, leaving a remainder of 47.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 47 to get 47.
Append the next digit (1) from the dividend to 47 and continue with: 471 / 645

Moving on to step 3:
If we divide 471 by 645, we get 0 and a remainder of 471.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 471 after subtracting 0 from 471.
Take the next digit (7) from the dividend and append it to 471, then repeat: 4717 / 645

Advancing to step 4:
If we divide 4717 by 645, we get 7 and a remainder of 202.
The next digit of our result is 7. 
Result so far: 7.0
If we take 4515 away from 4717, we end up with 202.
Append the next digit (1) from the dividend to 202 and continue with: 2021 / 645

Moving on to step 5:
When dividing 2021 by 645, we get 3 with a remainder of 86.
Put 3 as the next digit of the answer. 
Result so far: 73.0
If we take 1935 away from 2021, we end up with 86.
Bring next digit (1) of the dividend behind the 86 and repeat the process: 861 / 645

Advancing to step 6:
If we divide 861 by 645, we get 1 and a remainder of 216.
Record the quotient 1 as the next digit in the result. 
Result so far: 731.0
If we subtract 645 from 861, we get 216.
Bring next digit (8) of the dividend behind the 216 and repeat the process: 2168 / 645

Going ahead to step 7:
645 goes into 2168 3 times with a remainder of 233.
Write down 3 as next digit of the result. 
Result so far: 7313.0
Subtracting 1935 from 2168 leaves us with 233.
Include the next digit (9) from the dividend after 233, then repeat: 2339 / 645

Advancing to step 8:
When dividing 2339 by 645, we get 3 with a remainder of 404.
Put 3 as the next digit of the answer. 
Result so far: 73133.0
Subtract 1935 from 2339 to get 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

On to step 9:
4040 divided by 645 is 6 with a remainder of 170.
Write down 6 as next digit of the result. 
Result so far: 73133.6
The remainder is 170 after subtracting 3870 from 4040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Let's proceed to step 10:
1700 divided by 645 is 2 with a remainder of 410.
Use 2 as the next digit of our solution. 
Result so far: 73133.62
If we take 1290 away from 1700, we end up with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Going ahead to step 11:
When dividing 4100 by 645, we get 6 with a remainder of 230.
The number 6 becomes the next digit in our result. 
Result so far: 73133.626
Subtracting 3870 from 4100 leaves us with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Going ahead to step 12:
645 goes into 2300 3 times with a remainder of 365.
Record the quotient 3 as the next digit in the result. 
Result so far: 73133.6263
Subtract 1935 from 2300 to get 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Advancing to step 13:
The number 645 fits into 3650 5 times, leaving a remainder of 425.
Write down 5 as next digit of the result. 
Result so far: 73133.62635
Subtracting 3225 from 3650 leaves us with 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Step 14:
The number 645 fits into 4250 6 times, leaving a remainder of 380.
Write down 6 as next digit of the result. 
Result so far: 73133.626356
Subtract 3870 from 4250 to get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Let's proceed to step 15:
When dividing 3800 by 645, we get 5 with a remainder of 575.
Put 5 as the next digit of the answer. 
Result so far: 73133.6263565
If we subtract 3225 from 3800, we get 575.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

Moving on to step 16:
645 can be fit into 5750 8 times, resulting in a remainder of 590.
Put 8 as the next digit of the answer. 
Result so far: 73133.62635658
Subtract 5160 from 5750 to get 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

The final outcome is 73133.62635658, with a leftover of 5.9e-07.