mute pi nanpa ale

sona nanpa la, mute pi nanpa ale li ken lukin sama "n!" li sama ni:$${\begin{aligned}n!&=n\times (n-1)\times (n-2)\times (n-3)\times \cdots \times 3\times 2\times 1\\\end{aligned}}$$sina ken toki ni:

$$5!=5\times 4!=5\times 4\times 3\times 2\times 1=120.$$

(o mute e nanpa ale tan wan tawa luka)

taso sina ken ala pali ni tawa nanpa weka

0! li sama wan.