how do you do prime factorization in the division method?

Question

and use these numbers as an example:
18
105
711

no, i HAVE to use the division method

Answer 1

18/2=9
9/3=3
9/3=3

so: (2)(3)(3)=18
----------------------------
105/3=35
35/5=7

so: (3)(5)(7)=105
-----------------------------
711/3=237

237/3=79

79 [79 is a prime number]

so multiply all the numbers that can't be divided: (79)(3)(3)

Answer 2

just use a factor tree

...18
.../..\
...2..9
....../..\
.....3...3

2*3^2

....105
..../...\
...5...21
......../..\
.......3...7

3*5*7


.....711
...../...\
...3....237
........./...\
........3...79
3^3*79