 
 <translate> First, we need to determine how many hours Jill studied in total. To find this out, we begin by performing 2 * 2 = 4 hours spent on day two, double what she spent on day 1. Next, we perform 4 - 1 = 3 hours to determine the amount she studied on the third day. We then add 2 + 4 + 3 = 9 hours spent in total across 3 days. Since there are 60 minutes in an hour, she studied 9 * 60 = 540 minutes in total.
Thus, the answer is 540. <hau> Da farko, muna bukatar mu san adadin sa'o'in da Jill ta yi nazari. Don gano wannan, za mu fara da yin 2 * 2 = 4 hours ciyar a rana ta biyu, sau biyu abin da ta ciyar a ranar 1. Bayan haka, za mu yi 4 - 1 = awoyi 3 don sanin yawan abin da ta yi nazari a rana ta uku. Sai mu ƙara 2 + 4 + 3 = 9 hours ciyar a total fadin 3 days. Tun da akwai minti 60 a cikin awa ɗaya, ta yi nazarin 9 * 60 = minti 540 gaba ɗaya. Saboda haka, amsar ita ce 540. 