Siriana followed the Professor instructions. She first moved 9 beads on the first row of the abacus to the right then 1 more. She then moved to the second row. She moved 4 beads to the right then another 4 and another 2. She then moved to the third row and moved 1 beads and other 6 beads to the right. So that will be 10 beads on the first row and 10 beads on the second and 7 on the third. Well that would make a sum of 27.