Generate a more complex version of this sentence The operation codes 51 - 54 did DECIMAL arithmetic Add, Subtract, Multiply and Divide on variable length numbers, stored as decimal characters.
Mesthi, versi sing luwih rumit saka ukara kasebut yaiku "Kode operasi 51 - 54 nindakake aritmatika DECIMAL Add, Subtract, Multiply lan Divide ing (dawane variabel) nomer, siji ujung saben disimpen ing alamat '' A 'lan' 'B' instruksi. "