The demand for expensive musical instruments might be quadrupled.
Since then oil prices have risen still further, and, in fact, have quadrupled during 1973.
The usually quoted cost of £1 billion must be more than quadrupled to £4·5 billion when the coal penny is taken into account.
Is he aware that the numbers have quadrupled in recent times?
The gross extra cost of doubling and quadrupling the retirement pension age addition would be £28 million and £84 million respectively.
Secondly, the price of oil quadrupled between 1973 and 1974, from roughly $2½ a barrel to $10½ a barrel, which affected world trade by slowing it down.
By 1998 that number had almost quadrupled, to 287.
In the near-decade since then it has quadrupled that effort to reach more than £40 million.
