The area of a trapezoid is 30 square centimeters, the upper and lower bases are 2 centimeters and 3 centimeters respectively, what is its height in centimeters
一个梯形面积30平方厘米，上、下底分别为2厘米、3厘米，它的高是多少厘米
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">30 * (2/5)</gadget>
<output>12</output>

<result>12</result>