 
 <prompt> Wetin be di relationship between 23.22 grains of gold and di setting price of 1 troy ounce of gold wey dey $20.67? Based on di question wey dey above, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: The Gold Standard Act of 1900 waka comot di bimetallic standard and define di dollar as 23.22 grains (1.505 g) of gold, wey be say dem set di price of 1 troy ounce of gold at $20.67. Silver coins still dey circulate reach 1964, when all silver waka comot from dimes and quarters, and di half dollar reduce to 40% silver. Silver half dollars no dey circulate again since 1970. Gold coins dem confiscate by Executive Order 6102 wey Franklin Roosevelt issue for 1933. Di gold standard change to 13.71 grains (0.888 g), wey be say dem set di price of 1 troy ounce of gold at $35. Dis standard dey till 1968. 