Find the length in centimeters (cm) of a side of an equilateral triangle with length 9/20 centimeters (cm) and a regular pentagon with the same perimeter.
9/20 3 [OP_MUL] 5 [OP_DIV]
var_a = 0.45
var_b = 3
var_c = var_a * var_b
var_d = 5
var_e = var_c / var_d
print('{:.2f}'.format(round(var_e+1e-10,2)))