The side length of a square tabletop is 70 cm. If you want to match a square tablecloth, it is required that all four sides can hang down by 15 cm. What is the minimum area of this tablecloth in square centimeters?
一个正方形桌面的边长是70厘米，如果要配一块正方形的桌布，要求四边都能垂下15厘米，这块桌布的面积至少是多少平方厘米？
<gadget id="calculator">70 + 15 + 15</gadget>
<output>100</output>

<gadget id="calculator">100 * 100</gadget>
<output>10_000</output>

<result>10_000</result>