Simple past tense and past participle of multiply.
Multiplied Sentence Examples
Books were in demand and were multiplied.
And similar records might be multiplied almost to any extent.
Among the ruder or savage tribes they possess but one form; but the ingenuity of man has devised many inventions to increase his comforts; he has varied and multiplied the characters and kinds of domestic animals for the same purpose, and hence the various breeds of horses, cattle and dogs.