I'm kind of in a rush, the answer is 72!
For this case we have the following number:

What we must do is rewrite the number as the product of two numbers.
We have then:

From here, we write the number as the multiplication of a whole number and a power of base ten.
We have then:

Where,
: whole number
: power of base 10
Answer:
The distance written as a whole number multiplied by a power of ten is:

PEMDAS!
1. 7-14=-7
2. -1*-7 = 7-5=2
3. 18-2-9 = 7