All 1,260 seats in a concert hall were full. If 7/18 of the audience wore glasses and 6/11 among the audience with no glasses were male, find out the number of male audience members who were not wearing glasses.
1260 1 7/18 [OP_SUB] [OP_MUL] 6/11 [OP_MUL]
var_a = 1260
var_b = 1
var_c = 0.3888888888888889
var_d = var_b - var_c
var_e = var_a * var_d
var_f = 0.5454545454545454
var_g = var_e * var_f
print(int(eval('{:.2f}'.format(round(var_g+1e-10,2)))))