Given the task definition and input, reply with output. You are given a sentence in Japanese. Your job is to translate the Japanese sentence into Spanish.

平均確率は30% だよ」と言うと左下前頭回が激しく反応します

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
La media es del 30% "", la circunvolución frontal inferior izquierda respondía con fuerza.