The area of a trapezoidal vegetable field is 10 square meters, its upper base is 4 meters, and its lower base is 6 meters. What is the height in meters? (solution by equation)
一块梯形菜地的面积是10平方米，它的上底是4米，下底是6米，高是多少米？(用方程解)
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 * (1/2)</gadget>
<output>2</output>

<gadget id="calculator">6 * (1/2)</gadget>
<output>3</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">10 / 5</gadget>
<output>2</output>

<result>2</result>