There are 2 number cards. One has 15 written on it, and the other has the value of number on the first card multiplied by 0.9. Find the area of the rectangle whose length and width are the same numbers on these two cards.
15 15 0.9 [OP_MUL] [OP_MUL]
var_a = 15
var_b = 15
var_c = 0.9
var_d = var_b * var_c
var_e = var_a * var_d
print('{:.2f}'.format(round(var_e+1e-10,2)))