What is the area of a large rectangle made of 50 small squares with a side length of 1 cm?
用50个边长为1厘来的小正方形拼成的大长方形，这个正方形的面积是多少平方厘米．
<gadget id="calculator">1 * 1 * 50</gadget>
<output>50</output>

<result>50</result>