Convert from cubic foot to drum [metric, petroleum]

Unit Definition (cubic foot)
The cubic foot is a traditional unit of volume in English speaking countries. One cubic foot equals 1728 in³, 1/27 yd³, 0.028 316 85 m³, or 28.316 85 liters. The cubic foot also holds about 7.4805 U.S. liquid gallons or about 6.2288 British Imperial gallons.

Unit Definition (drum [metric, petroleum])
The drum [metric, petroleum] is a unit of volume sometimes used in the oil trade. In the metric world, drums of 200 liters, 205 liters, and 208 liters are in use as substitutes for the traditional size.