There is a trapezoid with an upper base of 5 decimeters, a lower base of 60 cm, and a height of 12 cm. What is the area of this trapezoid in square centimeters?
有一块上底是5分米，下底是60厘米，高是12厘米的梯形，这个梯形的面积是多少平方厘米？
<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">50 + 60</gadget>
<output>110</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">110 * 6</gadget>
<output>660</output>

<result>660</result>