Xiaopang has 3 identical small squares, at least how many such small squares can be added to form a large square.
小胖有3个相同的小正方形，至少在添多少个这样的小正方形才能搭成一个大正方形．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<result>1</result>