fahrenheit =: 50
   (fahrenheit - 32) * 5%9
10

   prices =: 3 1 4 2
   orders =: 2 0 2 1
   orders * prices
6 0 8 2

   +/ orders * prices
16

   +/ \ 1 2 3 4 5
1 3 6 10 15

   2 3 * / 1 2 3 4 5
2 4 6  8 10
3 6 9 12 15

   (cube=: ^&3) i. 9
0 1 8 27 64 125 216 343 512