 
 <translate> If currently there are 15 swans in the pond, in two years' time there will be 15 * 2 = 30 swans. In another two years, the number of swans in the pond will double to 2 * 30 = 60 swans. In another two years, the number of swans in the pond will double to 2 * 60 = 120 swans. If after 6 years there are 120 swans in the pond, in eight years times there will be 2 * 120 = 240 swans. In another two years, which is 10 years, there will be 2 * 240 = 480 swans in the pond. The final answer: 480. <hau> Idan a halin yanzu akwai swans 15 a cikin tafkin, a cikin shekaru biyu za a sami swans 15 * 2 = 30. A cikin wasu shekaru biyu, adadin swans a cikin tafkin zai ninka zuwa 2 * 30 = swans 60. A cikin wasu shekaru biyu, adadin swans a cikin tafkin zai ninka zuwa 2 * 60 = swans 120. Idan bayan shekaru 6 akwai swans 120 a cikin tafkin, a cikin shekaru takwas sau 2 * 120 = 240 swans. A cikin wasu shekaru biyu, wanda shine shekaru 10, za a sami 2 * 240 = 480 swans a cikin tafkin. Amsar ƙarshe: 480. 