70478379 divided by 15 
We're looking to find how many times 15 goes into 70478379.

Advancing to step 1:
When dividing 7 by 15, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (0) from the dividend to 7 and continue with: 70 / 15

Going ahead to step 2:
When dividing 70 by 15, we get 4 with a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 60 away from 70, we end up with 10.
Include the next digit (4) from the dividend after 10, then repeat: 104 / 15

Let's proceed to step 3:
104 divided by 15 is 6 with a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 46.0
The remainder is 14 after subtracting 90 from 104.
Take the next digit (7) from the dividend and append it to 14, then repeat: 147 / 15

Advancing to step 4:
When dividing 147 by 15, we get 9 with a remainder of 12.
Use 9 as the next digit of our solution. 
Result so far: 469.0
Deduct 135 from 147 and we're left with 12.
Include the next digit (8) from the dividend after 12, then repeat: 128 / 15

On to step 5:
15 goes into 128 8 times with a remainder of 8.
Put 8 as the next digit of the answer. 
Result so far: 4698.0
If we subtract 120 from 128, we get 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 15

On to step 6:
15 can be fit into 83 5 times, resulting in a remainder of 8.
Write down 5 as next digit of the result. 
Result so far: 46985.0
Subtracting 75 from 83 leaves us with 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 15

Advancing to step 7:
15 can be fit into 87 5 times, resulting in a remainder of 12.
Put 5 as the next digit of the answer. 
Result so far: 469855.0
If we subtract 75 from 87, we get 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 15

Going ahead to step 8:
When dividing 129 by 15, we get 8 with a remainder of 9.
Put 8 as the next digit of the answer. 
Result so far: 4698558.0
The remainder is 9 after subtracting 120 from 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 9:
When dividing 90 by 15, we get 6 with a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 4698558.6
Deduct 90 from 90 and we're left 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.

Let's proceed to step 10:
15 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 4698558.6
If we subtract 0 from 0, we 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.

Moving on to step 11:
15 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 4698558.6
If we take 0 away from 0, we end up 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.

The final outcome is 4698558.6, with a leftover of 0.0.