There were 7 crates containing 6 bottles of juice each, and I broke the juice bottles in 3 of the crates while moving the crates. How many bottles of juice are left?
7 3 [OP_SUB] 6 [OP_MUL]
var_a = 7
var_b = 3
var_c = var_a - var_b
var_d = 6
var_e = var_c * var_d
print(int(var_e))