Xiaofang bought a square tablecloth for the round dining table at home. The diameter of the round tabletop is 1.4 meters and the height is 1.6 meters. If the four corners of the square tablecloth just touch the ground, the square tablecloth will How many meters is the corner line?
小芳给家里的圆形餐桌买了一块正方形桌布，量得圆形桌面的直径是1.4米，高是1.6米，如果使铺在桌面上的正方形桌布的四角恰好刚刚接触地面，正方形桌布的对角线长多少米？
<gadget id="calculator">1.6 * 2</gadget>
<output>3.2</output>

<gadget id="calculator">1.4 + 3.2</gadget>
<output>4.6</output>

<result>4.6</result>