There is a center point inside the rectangle, and the distances from it to the sides are 7 cm and 5 cm respectively, what is the area of the rectangle in square centimeters?
长方形内有一中心点，它到各边的距离分别是7厘米和5厘米，这个长方形的面积是多少平方厘米？
<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">14 * 10</gadget>
<output>140</output>

<result>140</result>