A piece of trapezoidal land with an area of 28 square meters measures 4.2 meters long at one base and 5.6 meters high. What is the length of the other side of this land in meters?
一块面积是28平方米的梯形土地，量得一条底边长4.2米，高5.6米，这块土地的另一条边底长多少米？
<gadget id="calculator">2 / 5.6</gadget>
<output>0.357143</output>

<gadget id="calculator">28 * 0.357143</gadget>
<output>10.000004</output>

<gadget id="calculator">10.000004 - 4.2</gadget>
<output>5.800004</output>

<result>5.800004</result>