The upper base of a trapezoid is 6 decimeters, the lower base is 1 meter, and the height is 5 meters. What is the area in square meters?
一个梯形的上底是6分米，下底是1米，高是5米，面积是多少平方米．
<gadget id="calculator">6 / 10</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) + 1</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(8/5) * (5/2)</gadget>
<output>4</output>

<result>4</result>