The cumulative quantity of 6623 is calculated by including each of the digits until eventually we have just one digit. In this instance it’s:홍익병원 - 대일고�?임광아파�?배광교회 - 등촌�?강서보건�?- 염창�?서울도시가�?- 양평한신아파�?선유도공원입�?- (�?당산초등학교 �?선유도역 �