56 pounds
One stone is equal to 14 pounds. 14 x 137 equals 1918 pounds.
A stone block is generally cut from a single piece of stone.
9.5 Assuming the asker actually meant "How many POUNDS in 9 and a half stone?" then the answer would be 133 Lbs (14 pounds in a stone. 14 x 10 = 140, 140 - 7 = 133).