一望而知

    yīwàngérzhī

    1. Idiomto be evident at a glance (idiom)

    这道题的答案一望而知,不需要太多计算。Zhè dào tí de dá'àn yīwàng'érzhī, bù xūyào tài duō jìsuàn.The answer to this problem is obvious at a glance and doesn't require much calculation.