Need Help writing fraction with powers

This is my first cse project so bear with me.

I am trying to write (length_one_side^2)/8 so I can find the area.

What I have

float length_one_side;
printf("Enter the length of one side of the garden: (in feet) ");
scanf("%f", length_one_side);

float triangular_bed_area;
printf("length_one_side*length_one_side/8");
scanf("%f", triangular_bed_area);

Any help would be much appreciative.

You write

float triangular_bed_area = length_one_side * length_one_side / 8;

Also posted here.

Scanf requires address of variable. e.g. scanf("%f", &length_one_side);