calculating (adj.)

1710, "carrying out calculations," present-participle adjective from calculate (v.). Meaning "given to forethought and shrewdly or selfishly seeking advantage, scheming," is attested from 1802.

calculating (n.)

1710, "calculation," verbal noun from calculate (v.). Calculating-machine "mechanical computer, machine which performs mathematical calculations" is from 1830 [Babbage].