There is a rectangular pool with a length of 10 meters and a width of 5 meters. There is a square fountain in the middle with a side length of 2 meters. What is the area of the pool?
有一个长方形水池，长10米，宽5米，中间有一座正方形的喷泉，边长2米，求水池的面积？
<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">50 - 4</gadget>
<output>46</output>

<result>46</result>