Such as 3*2=3/(1/2), 5*3=5/(1/3), 7*4=7/(1/4),...m*n=m/(1/(n )) (m, n are both natural numbers greater than 0). What kind of mathematical thought is contained in such a formula? Please explain briefly. How many.
形如3*2=3/(1/2)，5*3=5/(1/3)，7*4=7/(1/4)，…m*n=m/(1/(n))(m、n均为大于0的自然数)．这样的算式中蕴藏着什么样的数学思想？请你简要说明．多少．
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