I gave some ten 10 won coins to Yoongi, and there are 7 left. Find out how much he gave to Yoongi.
10 10 7 [OP_SUB] [OP_MUL]
var_a = 10
var_b = 10
var_c = 7
var_d = var_b - var_c
var_e = var_a * var_d
print(int(var_e))