There is a square-shaped window with a side of 90 centimeters (cm). When decorating the edge of this window with stickers at 3 centimeters (cm) intervals, find how many stickers are needed in total.
90 4 [OP_MUL] 3 [OP_FDIV]
var_a = 90
var_b = 4
var_c = var_a * var_b
var_d = 3
var_e = var_c // var_d
print(int(var_e))