They added it wrong. They added it like this:

When it shouldve been this:

They just added a place marker in all numbers below 100.
Answer:
Step-by-step explanation:
hello :
(4a) × (3b) =12ab
963/3 = 321
Recheck = 321 * 3 = 963
Answer = 321
A u-shaped curve with certain specific properties. Formally, a parabola is defined as follows: For a given point, called the focus, and a given line not through the focus, called the directrix, a parabola is the locus of points such that the distance to the focus equals the distance to the directrix.