If a number multiplied by -2/3 and divided by -4/5 equals -1/2, what number is it?
-1/2 -4/5 [OP_MUL] -2/3 [OP_DIV]
var_a = -0.5
var_b = -0.8
var_c = var_a * var_b
var_d = -0.6666666666666666
var_e = var_c / var_d
print('{:.2f}'.format(round(var_e+1e-10,2)))