The upper base of the trapezoid is 10 decimeters, the lower base is 22 cm, and the height is 15 cm. What is the area in square meters?
梯形的上底是10分米，下底是22厘米，高是15厘米，面积是多少平方米．
<gadget id="calculator">10 / 10</gadget>
<output>1</output>

<gadget id="calculator">22 / 100</gadget>
<output>11/50 = around 0.22</output>

<gadget id="calculator">1 + (11/50)</gadget>
<output>61/50 = around 1.22</output>

<gadget id="calculator">15 / 100 / 2</gadget>
<output>3/40 = around 0.075</output>

<gadget id="calculator">(61/50) * (3/40)</gadget>
<output>183/2_000 = around 0.0915</output>

<result>183/2_000 = around 0.0915</result>