Xiao Ming marks several points on the sides of the square, and there are exactly 3 points on each side, so how many points are marked at least.
小明在正方形的边上标出若干个点，每条边上恰有3个，那么所标出的点最少有多少个．
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">12 - 4</gadget>
<output>8</output>

<result>8</result>