Coding and Decoding Questions

In a certain code language, "CAUGHT" is written as "125679" and "HEN" is written as "740". How is "TAUGHT" written in that code language?

If 5 * 3 = 19 and 8 * 5 = 49, then what should 6 * 4 be?

In a certain code language, “HARMS” is written as “81181319” and “FLUTE” is written as “61221205”. How is “WOUND” written in that codelanguage?

In a certain code language, "TROUPE" is written as "GILFKV" and "ERUPTION" is written as "VIFKGRLM". How is "GENIUS" written in that code language?

In a certain code language, "RIVER" is written as "12351" and "RED" is written as "156". How is "DRIVER" written in that code language?

In a certain code language, “MONEY” is written as “ZDONN”. How is “RATED” written in that code language?

In a certain code language "GASTRIC" is written as "UCIREKT". How will "DECEIVE" be written in that code language?

If "A" denotes "multiplied by", "B" denotes "subtracted from", "C" denotes "added to" and "D" denotes "divided by", then

7 B 17 C 88 D 11 A 6 = ?