[belajar-access] kalkulasi fild di tabel access

Salam.

Gimana caranya untuk kalkulasi fild di tabel access
misal

no. namajalan dari ke interfal kondisi
1 abc 10 20 baik
2 bcd 20 100 perbaikan
.
.
.
.dst

gimana agar saya dapat melalkukan kalkulasi fild di tabel itu....
sama halnya seperti di exel....

Thanks atas pencerahannya...

abd.........

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