Pi Times R←○Y

Y may be any numeric array. R is numeric. The value of R is the product of the mathematical constant π=3.14159... (Pi), and Y.

Example

      ○0.5 1 2
1.570796327 3.141592654 6.283185307

      ○0J1
0J3.141592654

      *○0J1 ⍝ Euler
¯1