Correct

定数

/ dìngshù /
Strokes

Definition

constant (math.)/quota/fixed number (e.g. of places on a bus)/fixed quantity (e.g. load of truck)/destiny

Example

As a Noun

fixed number

1
Xīnzhōng
心中
yǒu
dìngshù
定数

already have a fixed number in mind

As a Noun

destiny; fate

2
néng
xìn
迷信
fánshì
凡事
dōu
yǒu
dìngshù
定数
de
shuō
说法
  

Don't blindly believe in the fallacy that everything is predestined.

As a Verb

fix a number