וַעֲשִׂ֣יתֶם ל֔וֹ כַּאֲשֶׁ֥ר זָמַ֖ם לַעֲשׂ֣וֹת לְאָחִ֑יו וּבִֽעַרְתָּ֥ הָרָ֖ע מִקִּרְבֶּֽךָ׃
vous le traiterez comme il a eu dessein de faire traiter son frère, et tu extirperas le mal du milieu de toi.
Bartenura
Because you shall not bear false witness. Since behold when it is impossible to [punish] the witnesses with "do to them as they planned", for example [they say] "We testify about a certain person [kohen] that he is the son of a divorced woman, the witnesses are lashed due to "you shall not bear false witness". Here [in this case], where there is warning against "you shall not bear false witness" and also "as they planned", they are lashed 80 [times]. The halacha is not like Rabbi Meir.
Bartenura
They pay with money. The zommemin that are obligated in with [their attempt] to cause payment, pay the money according to the number of the witnesses. If it was three witnesses and they were made zommemin, each one pay a third of the [total] money that they wanted to cause him [the person they are testifying about] to lose.
Bartenura
Lashes are not divided. It's not that each of the witnesses are lashed a portion of the [total number of] lashes, rather each one is lashed 40 [times]. This is because we need "do to them as they planned", and each one sought to have the accused lashed a full amount. [However] money is combined [after being divided], when each of the witnesses gives their portion, behold he [the accused] receives what they sought to make him lose, however lashes are not combined.