Use "×" instead of '*" to describe multiplication

[timbrisc]

Issue migrated from trac ticket # 5796

component: unit definitions | priority: minor

2021-08-07 12:24:59: [email protected] created the issue

---

In §44, the "*" character is used for what appears to be multiplication:

The function pair denoted “100tan(1 rad)” is defined as fPD(α) = tan(α) * 100

Elsewhere, this document is careful to use "×" to denote multiplication, rather than "", to avoid potential confusion with other meanings of "".