quadruple

US /kwɑːˈdruː.pəl/
UK /kwɑːˈdruː.pəl/
1.

gấp bốn lần

to become four times as big, or to multiply a number or amount by four:

:
The number of students at the college has quadrupled in the last ten years.
1.

gấp bốn lần

consisting of four parts, or four times greater in amount, number, or size:

:
My father had quadruple bypass heart surgery.
1.

gấp bốn lần

a size, amount, price, etc. four times as big as something else:

:
This figure is roughly quadruple the amount authorized in 2002.