After Jisoo washed the dishes, she put the plate on the shelf 1st from the left, 7th from the right, 2nd from the top, and 4th from the bottom. How many slots are there on the shelf?
1 7 [OP_ADD] 1 [OP_SUB] 2 4 [OP_ADD] 1 [OP_SUB] [OP_MUL]
var_a = 1
var_b = 7
var_c = var_a + var_b
var_d = 1
var_e = var_c - var_d
var_f = 2
var_g = 4
var_h = var_f + var_g
var_i = 1
var_j = var_h - var_i
var_k = var_e * var_j
print(int(var_k))