The wiki has some special formatting to show the formulas, so I guess that's what's happening...
The worst case example:
R -> effects -> Minimum Physical Damage per Bullet
"units": [
"[25 / 30 / 35 / 40 / 45 ] × [1",
"[25 / 30 / 35 / 40 / 45 ] × [1",
"[25 / 30 / 35 / 40 / 45 ] × [1"
]