If you wanted to match a light local drizzle that falls on a few towns for a few hours, how long would you need to stand on a hilltop opening cans? Realistically accounting for time needed to sleep and sustainable can opening pace for ~16 hours per day

What’s a light drizzle? 0.5mm/hr? Over something like 1500km² around the Birmingham, Coventry, Tamworth area for three and a half hours?

How many cans of root beer would you need to match that?