73781374 ÷ 15 
We're looking to find how many times 15 goes into 73781374.

Advancing to step 1:
7 divided by 15 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 15

Moving on to step 2:
15 can be fit into 73 4 times, resulting in a remainder of 13.
The next digit of our result is 4. 
Result so far: 4.0
Subtracting 60 from 73 leaves us with 13.
Include the next digit (7) from the dividend after 13, then repeat: 137 / 15

On to step 3:
15 can be fit into 137 9 times, resulting in a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 49.0
Deduct 135 from 137 and we're left with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 15

Going ahead to step 4:
If we divide 28 by 15, we get 1 and a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 491.0
If we take 15 away from 28, we end up with 13.
Bring next digit (1) of the dividend behind the 13 and repeat the process: 131 / 15

Moving on to step 5:
131 divided by 15 is 8 with a remainder of 11.
Write down 8 as next digit of the result. 
Result so far: 4918.0
If we take 120 away from 131, we end up with 11.
Bring next digit (3) of the dividend behind the 11 and repeat the process: 113 / 15

Going ahead to step 6:
113 divided by 15 is 7 with a remainder of 8.
Write down 7 as next digit of the result. 
Result so far: 49187.0
If we subtract 105 from 113, we get 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 15

On to step 7:
87 divided by 15 is 5 with a remainder of 12.
Use 5 as the next digit of our solution. 
Result so far: 491875.0
Subtracting 75 from 87 leaves us with 12.
Include the next digit (4) from the dividend after 12, then repeat: 124 / 15

Going ahead to step 8:
If we divide 124 by 15, we get 8 and a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 4918758.0
If we subtract 120 from 124, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
40 divided by 15 is 2 with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 4918758.2
Deduct 30 from 40 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 10:
15 can be fit into 100 6 times, resulting in a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 4918758.26
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 11:
The number 15 fits into 100 6 times, leaving a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 4918758.266
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 4918758.266 and a remainder of 0.001.