A woman is acquired in three ways; she acquires herself in two ways: She is acquired with money, with a document, or with cohabitation.  With money —- Beis Shammai say: With a dinar or with something worth a dinar. Beis Hillel, however, say: With a perutah or with something worth a perutah. How much is a perutah? One-eighth of an Italian issar.  She acquires herself with a get or with the death of the husband.  A yevamah is acquired with cohabitation, and acquires herself with chalitzah or with the death of the yavam.