Force multiplication

ตัวคูณกำลังรบ

Ref: https://th.wikipedia.org/wiki/%E0%B8%95%E0%B8%B1%E0%B8%A7%E0%B8%84%E0%B8%B9%E0%B8%93%E0%B8%81%E0%B8%B3%E0%B8%A5%E0%B8%B1%E0%B8%87%E0%B8%A3%E0%B8%9A