6 yds, 9 ft, 4 in
1 yd = 36 inches...so 6 yds = (6 x 36) = 216 inches
1 ft = 12 inches....so 9 ft = (9 x 12) = 108 inches
and then we have the 4 inches
add : 216 + 108 + 4 = 328 inches.......x 2 = 656 inches
12 yds , 18 ft, 8 in = 12(36) + 18(12) + 8 = 656 inches
answer is : 12 yds, 18 ft, 8 in
