what's the number of days that have passed since patient 87232 last stayed in careunit micu on the current hospital visit?
select 1 * ( strftime('%j',current_time) - strftime('%j',transfers.intime) ) from transfers where transfers.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 87232 and admissions.dischtime is null ) and transfers.careunit = 'micu' order by transfers.intime desc limit 1