The area of a trapezoidal land is 16 square meters, the upper base is 4.6 meters, the height is 3.2 meters, how many meters is the lower base?
一块梯形土地面积是16平方米，上底是4.6米，高是3.2米，下底是多少米？
<gadget id="calculator">3.2 / 2</gadget>
<output>1.6</output>

<gadget id="calculator">4.6 * 1.6</gadget>
<output>7.36</output>

<gadget id="calculator">16 - 7.36</gadget>
<output>8.64</output>

<gadget id="calculator">8.64 / 1.6</gadget>
<output>5.4</output>

<result>5.4</result>