ei bhāva-yukta dekhi' rādhāsya-nayana
saṅgama ha-ite sukha pāya koṭi-guṇa
ei bhāva - with these ecstatic symptoms; yukta - combined together; dekhi' - seeing; rādhā-āsya-nayana - the face and eyes of Śrīmatī Rādhārāṇī; saṅgama ha-ite - than direct embracing; sukha pāya - enjoys happiness; koṭi-guṇa - millions of times more.
This is further explained in the following verse from the Ujjvala-nīlamaṇi (Anubhāva-prakaraṇa 41) of Śrīla Rūpa Gosvāmī.