Usage
{{slotsize | 1x1}}
result: 1 Slot
{{slotsize | 2x3}}
result: 6 Slots (2x3)
{{slotsize | anything else}}
result: anything else
{{slotsize | 1x1}}
result: 1 Slot
{{slotsize | 2x3}}
result: 6 Slots (2x3)
{{slotsize | anything else}}
result: anything else