Running The Math

I had just got the second tumbler in the safe when the phone rang behind me.

I froze, as much to stop myself setting off the safe's burgler alarm as it was indecision.

In a split second, I ran through the math, where if I let it ring it would probably wake up the owner, but if I cut it off now there's a chance they'd investigate and be alerted anyway.

In the end, I reached our before the second ring and picked up.

"Happy 60th birthday!"

Given the first two numbers had been the date, I ran the math.