I don't get it. What is significant figure? I entered 104 because 125/360 x 2pi(48) equals 104.7197551.

Answer:
See below
Step-by-step explanation:
Significant figures mean how many DECIMAL places you round to, not the digits before the decimal. In your case, 104.7197551 rounded to 3 significant figures would be 104.720
Hope that makes sense!