Algorithms; Arithmetic -- Early works to 1900; Mathematics -- History
¶ Her{e} he teches how þ{o}u schalt wyrch in þis craft. þou schalt
m{ul}tiplye þe last figur{e} of þe nombre, and quen þ{o}u hast so ydo
þou schalt draw all{e} þe figures of þe neþ{er} nounbre mor{e} taward þe
ryȝt side, so qwe{n} þ{o}u hast m{u}ltiplyed þe last figur{e} of þe
heyer nounbre by all{e} þe neþ{er} figures. And sette þe nounbir þat
comes þer-of ou{er} þe last figur{e} of þe neþ{er} nounb{re}, & þen þou
schalt sette al þe oþ{er} fig{ur}es of þe neþ{er} nounb{re} mor{e}
ner{e} to þe ryȝt side. ¶ And whan þou hast m{u}ltiplied þat figur{e}
þat schal be m{u}ltiplied þe next aft{er} hym by al þe neþ{er} figures.
And worch as þou dyddyst afor{e} til [*leaf 156b] þou come to þe ende.
And þou schalt vnd{er}stonde þat eu{er}y figur{e} of þe hier nounb{re}
schal be m{u}ltiplied be all{e} þe figur{e}s of the neþ{er} nounbre,
yf þe hier nounb{re} be any figur{e} þen on{e}. lo an Ensampul her{e}
folowyng{e}.
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þou schalt begyne to m{u}ltiplye in þe lyft side. M{u}ltiply 2 be 2, and
twyes 2 is 4. set 4 ou{er} þe hed of þ{a}t 2, þen m{u}ltiplie þe same
hier 2 by 3 of þe nether nounbre, as thryes 2 þat schal be 6. set 6
ou{er} þe hed of 3, þan m{u}ltiplie þe same hier 2 by þat 2 þe quych
stondes vnd{er} hym, þ{a}t wol be 4; do away þe hier 2 & sette þ{ere} 4.
¶ Now þ{o}u most antery þe nether nounbre, þat is to say, þ{o}u most
sett þe neþ{er} nounbre more towarde þe ryȝt side, as þus. Take þe
neþ{er} 2 toward þe ryȝt side, & sette it eueɳ vnd{er} þe 4 of þe hyer
nounb{r}e, & ant{er}y all{e} þe figures þat comes aft{er} þat 2, as þus;
sette 2 vnd{er} þe 4. þen sett þe figur{e} of 3 þ{ere} þat þe figure of
2 stode, þe quych is now vndur þ{a}t 4 in þe hier nounbre; þen sett þe
oþer figur{e} of 2, þe quych is þe last fig{ur}e toward þe lyft side of
þe neþ{er} nomb{er} þ{ere} þe figur{e} of 3 stode. þen þ{o}u schalt haue
such a nombre.
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[*leaf 157a] ¶ Now m{u}ltiply 4, þe quych comes next aft{er} 6, by þe
last 2 of þe neþ{er} nounbur toward þe lyft side. as 2 tymes 4, þat wel
be 8. sette þat 8 ou{er} þe figure the quych stondes ou{er} þe hede of
þat 2, þe quych is þe last figur{e} of þe neþ{er} nounbre; þan multiplie
þat same 4 by 3, þat comes in þe neþ{er} rewe, þat wol be 12. sette þe
digit of þe composyt ou{er} þe figure þe quych stondes ou{er} þe hed of
þat 3, & sette þe articule of þis co{m}posit ou{er} al þe figures þat
stondes ou{er} þe neþ{er} 2 hede. þen m{u}ltiplie þe same 4 by þe 2 in
þe ryȝt side in þe neþ{er} nounbur, þat wol be 8. do away 4. & sette
þ{ere} 8. Eu{er} mor{e} qwen þ{o}u m{u}ltiplies þe hier figur{e} by þat
figur{e} þe quych stondes vnd{er} hym, þou schalt do away þat hier
figur{e}, & sett þer þat nounbre þe quych comes of m{u}ltiplicacioɳ of
ylke digittes. Whan þou hast done as I haue byde þe, þ{o}u schalt haue
suych an ord{er} of figur{e} as is her{e},
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