24 ARITHMETIC. 



Method of PrOOS. 



Make the former multiplicand the multiplier, and the 

 multiplier the multiplicand, and proceed as before j and if 

 this product is equal to the former, the product is right. 



EXAMPLES. 

 (I) (2) 



Multiply 23456787454 Multiply 32745654473 



by 7 by 234 



164197512178 Producti 130982617892 



. u-*--*- 98236963419 



65491308946 



Product 7662483146682 



3. Multiply 32745(^75474 by 2. Ans. 65491350948- 



4. Multiply 84356745674 by 5. Ans. 421783728370. 

 ^. Multiply 3274656461 by 12. Ans. 39295877532. 



6. Multiply 273580961 by 23. Ans. 6292362103. 



7. Multiply 82164973 by 3027. Ans. 2487 1337327 1. 



8. Multiply 8496427 by 874359. Ans. 7428927415293. 



CONTRJCriONS. 



I. Whn there are cyphers to the right hand of one cr both the 

 nufnbers to be multiplied* 



RULE. 



Proceed as before, neglecting the cyphers, and to the 

 tight hand of the product place as many cyphers as arc 

 in both the number*^ 



EXAMPLES. 



