Xiao Ming enlarges a square with a side length of 5 cm at a ratio of 2:1. How many times is the area of the enlarged square larger than the original?
小明把一个边长5厘米的正方形，按2：1的比放大，放大后正方形的面积是原来的多少倍
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">100 / 25</gadget>
<output>4</output>

<result>4</result>