乘以 Traditional form: 乘以 Pinyin (reading): chéngyǐ Definitions: (math.) multiplied with Characters: 乘 - ride, mount; to make use of; to ascend; to multiply 以 - according to; so as to; because of; then Traditional characters: 乘 - ride, mount; to make use of; to ascend; to multiply 以 - according to; so as to; because of; then